Re: Bridging Question?can it be hub too [7:60546]
just a word on IRB it came as a replacement to CRB in 11.2, and it allows you to to route and brisge a protocol between bridged and routed interfaces as well as bridge groups basically to cary traffic from routed to bridged interfaces and introduces the BVI interface. as for the duplication of packet to the second server, as said, multicast is the way it's done. Regards, Amar. Priscilla Oppenheimer a icrit dans le message de news: [EMAIL PROTECTED] Tat Wee, Kan wrote: I'm also interested to know if it's possible to configure span on a router. SPAN stands for Switch Port Analyzer. It's not intended for routers. I'm loath to say you simply can't do it in case Cisco lets you, but I couldn't find anything in their router config guides that said you could do it. It's probably way too risky to have the exact same traffic flowing in two directions at once. Think of all the things it would break. (Of course that applies on switches too, actually.) I've posted this question earlier at Cisco NetPro forum, but I got no concrete answer on my query. Here's a repost into this group. : --snipped-- The story is like this - I have a 7204VXR router connected to a 45 Mbps satellite downlink via a HSSI interface. I have a PA-2FE-TX module on the router and currently Fa1/0 (IP: 10.1.1.254) is connected to Server A (IP: 10.1.1.1). Traffic coming in from the satellite is being routed to Server A. There is a default ip route which goes like this: ip route 0.0.0.0 0.0.0.0 10.1.1.1 There are access-lists implemented on Fa1/0 such that only certain ports are being permitted to be routed to Server A. The question: I would like to make use of the other FE port (Fa1/1) and implement another set of different access rules such that the traffic from the satellite will also go to Server B (IP: 10.2.2.2). Why do you want to replicate packets to two devices? Perhaps if you give us more background we can help. If you're just trying to mirror two servers, for example, there are many options for doing that without trying to do something bizarre on the router. Another thought that comes to mind is that when you want to send the exact same data to two or more devices, this usually indicates a need to use broadcast or multicast packets. Could you get the senders to send to a multicast address? The recipients would have to register to receive it. Is this a private network or is NAT involved, by the way? How good are you at writing software? You could probably put a LINUX box into the mix and have it be the recipient and then act as a redirector and send the packets to both servers. The problem is traffic is only flowing to the Fa1/0 interface, and not onto the other Fa1/1 interface. How could I have two streams of data 'duplicated' out onto the two interfaces? Having another default route to 10.2.2.2 would not work as the traffic would load balance out to the 2 interfaces. Some guy I've asked mentioned something about IRB. Is this correct? I certainly can't think of a way to do it with IRB. You may want to repost this in a new thread with a relevant title. Be SURE to tell us what it is you are really trying to do or you won't get a real answer. Tell us what you want to do and why; don't tell us how you want to do it (by making a router duplicate packets or whatever). Don't put anything into the solution part of the message. Just put as much info as you can think of in the problem desciption, from an application point of view, and maybe somebody will have a creative suggestion. Be sure to explain enough so that we don't just think that you don't understand traffic flow and routing. If you really want the exact same packets to go to two different servers, say that, and say why unless it's proprietary. Priscilla Basically if this is a switch, I could think of doing a SPAN where the satellite downstream is being replicated onto 2 FE ports. How could I achieve this on a router? There's a picture of the setup at http://kan.hardware-one.com/7204.gif. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60925t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question?can it be hub too [7:60546]
Hi all, Can I make the router as hub too ,suppose my requirement is like that what ever data comes on one port should come on other,Can we configure span on router as we do on switch. Regardsmlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60639t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question?can it be hub too [7:60546]
Hi all, Can I make the router as hub too ,suppose my requirement is like that what ever data comes on one port should come on other,Can we configure span on router as we do on switch. Regards mlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60640t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question?can it be hub too [7:60546]
buy the relatively new NM-16ESW or NMD-36-ESW-2GIG and you can make your 3600/3700 router a hub too. Dave Simmi Singla wrote: Hi all, Can I make the router as hub too ,suppose my requirement is like that what ever data comes on one port should come on other,Can we configure span on router as we do on switch. Regardsmlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60644t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: RE: Bridging Question?can it be hub too [7:60546]
Simmi Singla wrote: Hi all, Can I make the router as hub too ,suppose my requirement is like that what ever data comes on one port should come on other,Can we configure span on router as we do on switch. No, you can't turn your router into a hub, although there are some multi-port modules you can add to a router that are hub modules. Those ports aren't routed. They are in a hub that is built-into a router. I suppose if you shut down all the other interfaces (the real routed interfaces) you would have turned your router into a hub. :-) Doing SPAN on a router wouldn't turn it into a hub. A hub doesn't understand frames, packets, data. It just forwards bits. A hub is a multi-port repeater. SPAN is smarter than that. It understands frames. It's also a switch technology. I don't think you can use it on a router, unless Cisco has added that recently. SPAN exists because switches replaced hubs, making it hard for protocol analysts to see what was happening. Priscilla Regards mlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60650t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question?can it be hub too [7:60546]
- Original Message - From: Simmi Singla To: Sent: Thursday, January 09, 2003 4:17 AM Subject: RE: Bridging Question?can it be hub too [7:60546] Hi, Can I make the router as hub too ,suppose my requirement is like that what ever data comes on one port should come on other,Can we configure span on router as we do on switch. I'm also interested to know if it's possible to configure span on a router. I've posted this question earlier at Cisco NetPro forum, but I got no concrete answer on my query. Here's a repost into this group. : --snipped-- The story is like this - I have a 7204VXR router connected to a 45 Mbps satellite downlink via a HSSI interface. I have a PA-2FE-TX module on the router and currently Fa1/0 (IP: 10.1.1.254) is connected to Server A (IP: 10.1.1.1). Traffic coming in from the satellite is being routed to Server A. There is a default ip route which goes like this: ip route 0.0.0.0 0.0.0.0 10.1.1.1 There are access-lists implemented on Fa1/0 such that only certain ports are being permitted to be routed to Server A. The question: I would like to make use of the other FE port (Fa1/1) and implement another set of different access rules such that the traffic from the satellite will also go to Server B (IP: 10.2.2.2). The problem is traffic is only flowing to the Fa1/0 interface, and not onto the other Fa1/1 interface. How could I have two streams of data 'duplicated' out onto the two interfaces? Having another default route to 10.2.2.2 would not work as the traffic would load balance out to the 2 interfaces. Some guy I've asked mentioned something about IRB. Is this correct? Basically if this is a switch, I could think of doing a SPAN where the satellite downstream is being replicated onto 2 FE ports. How could I achieve this on a router? There's a picture of the setup at http://kan.hardware-one.com/7204.gif. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60662t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question?can it be hub too [7:60546]
Tat Wee, Kan wrote: I'm also interested to know if it's possible to configure span on a router. SPAN stands for Switch Port Analyzer. It's not intended for routers. I'm loath to say you simply can't do it in case Cisco lets you, but I couldn't find anything in their router config guides that said you could do it. It's probably way too risky to have the exact same traffic flowing in two directions at once. Think of all the things it would break. (Of course that applies on switches too, actually.) I've posted this question earlier at Cisco NetPro forum, but I got no concrete answer on my query. Here's a repost into this group. : --snipped-- The story is like this - I have a 7204VXR router connected to a 45 Mbps satellite downlink via a HSSI interface. I have a PA-2FE-TX module on the router and currently Fa1/0 (IP: 10.1.1.254) is connected to Server A (IP: 10.1.1.1). Traffic coming in from the satellite is being routed to Server A. There is a default ip route which goes like this: ip route 0.0.0.0 0.0.0.0 10.1.1.1 There are access-lists implemented on Fa1/0 such that only certain ports are being permitted to be routed to Server A. The question: I would like to make use of the other FE port (Fa1/1) and implement another set of different access rules such that the traffic from the satellite will also go to Server B (IP: 10.2.2.2). Why do you want to replicate packets to two devices? Perhaps if you give us more background we can help. If you're just trying to mirror two servers, for example, there are many options for doing that without trying to do something bizarre on the router. Another thought that comes to mind is that when you want to send the exact same data to two or more devices, this usually indicates a need to use broadcast or multicast packets. Could you get the senders to send to a multicast address? The recipients would have to register to receive it. Is this a private network or is NAT involved, by the way? How good are you at writing software? You could probably put a LINUX box into the mix and have it be the recipient and then act as a redirector and send the packets to both servers. The problem is traffic is only flowing to the Fa1/0 interface, and not onto the other Fa1/1 interface. How could I have two streams of data 'duplicated' out onto the two interfaces? Having another default route to 10.2.2.2 would not work as the traffic would load balance out to the 2 interfaces. Some guy I've asked mentioned something about IRB. Is this correct? I certainly can't think of a way to do it with IRB. You may want to repost this in a new thread with a relevant title. Be SURE to tell us what it is you are really trying to do or you won't get a real answer. Tell us what you want to do and why; don't tell us how you want to do it (by making a router duplicate packets or whatever). Don't put anything into the solution part of the message. Just put as much info as you can think of in the problem desciption, from an application point of view, and maybe somebody will have a creative suggestion. Be sure to explain enough so that we don't just think that you don't understand traffic flow and routing. If you really want the exact same packets to go to two different servers, say that, and say why unless it's proprietary. Priscilla Basically if this is a switch, I could think of doing a SPAN where the satellite downstream is being replicated onto 2 FE ports. How could I achieve this on a router? There's a picture of the setup at http://kan.hardware-one.com/7204.gif. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60672t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Bridging Question? [7:60546]
I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60546t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question? [7:60546]
A router might be configured to do bridging to support a number of applications or problems: The IP addressing may have been designed as one big subnet, instead of multiple subnets. Non-routable protocols such as NetBIOS (NetBEUI) or DEC's Local Area Transport (LAT) might be running on the network. The company might have an IBM legacy. IBM traditionally focused on bridging for Token Ring and SNA environments. There might be some other application that actually depends on broadcasts getting forwarded, and broadcast radiation might not be considered a problem due to low volume. Bridging might be considered simpler. There's no need for a routing protocol. There's no need to configure a default gateway on the hosts. Priscilla mlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60548t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question? [7:60546]
Mike, Well, we have an ATM PVC into the public cloud where the ISP later converts it to Frame, and on our 2600 we take the frame circuit bridge it... here's a snippet of the configs::: frame-router# FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question? [7:60546]
I take it, 3 consecutive dots [one per line] does something to ixnay the remainder of an email?? -Original Message- From: COULOMBE, TROY Sent: Tuesday, January 07, 2003 5:52 PM To: 'mlehr'; [EMAIL PROTECTED] Subject: RE: Bridging Question? [7:60546] Mike, Well, we have an ATM PVC into the public cloud where the ISP later converts it to Frame, and on our 2600 we take the frame circuit bridge it... here's a snippet of the configs::: frame-router# interface Serial0/0 description Frame Relay to datacenter no ip address ip directed-broadcast encapsulation frame-relay IETF no ip mroute-cache no fair-queue ! interface Serial0/0.1 point-to-point frame-relay interface-dlci 41 IETF bridge-group 1 interface BVI1 ip address xxx.xxx.125.33 255.255.255.248 and on the ATM interface [in a 6509]::: interface ATM0 atm preferred phy A atm uni-version 4.0 atm pvc 125 2 41 aal5snap atm bind pvc vlan 125 125 no atm auto-configuration atm ilmi-keepalive no atm address-registration -Original Message- From: mlehr [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 07, 2003 5:11 PM To: [EMAIL PROTECTED] Subject: Bridging Question? [7:60546] I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60558t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Bridging Question? [7:60546]
mlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Just to give you a specific example that builds on Priscilla's reply: This past summer I had a client who had hired me to do the WAN stuff for an international network and another contractor to install some telephone switches. The switches were to be managed via an out-of-band IP network. The folks back at the factory had configured every one of the switch management IPs to be in the same subnet. Problem was, no one could figure out how to change the IPs in the field and extensive documentation and training material had already been produced. So I saved the day by eliminating the static routes and setting up a bridge group (don't ask how the change in router configs affected the documentation -- I didn't ask and no one fessed up). So it's sometimes an unintentional patch. What's more, even if they had done this on purpose, I don't think Cisco sells bridges anymore. So a router with a bridge group still would have been required. Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60559t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question? [7:60546]
good points, Scott. Down there at the end I've added a couple of my own experiences in the real world. s vermill wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... mlehr wrote: I have studied for and successfully tested CCNA CCNP and now I am studying for the CCIE written exam. At this point in my studies, I am reading up on the subject of Bridging. I fully understand the concept of bridging when it comes to switches, but I am perplexed as to why a router would need to perform a bridging function. Obviously bridging capabilities are built into the routers IOS but what need would prompted anyone to use this feature. In the other studies Bridging was not a covered subject so this is new territory for me. Just to give you a specific example that builds on Priscilla's reply: This past summer I had a client who had hired me to do the WAN stuff for an international network and another contractor to install some telephone switches. The switches were to be managed via an out-of-band IP network. The folks back at the factory had configured every one of the switch management IPs to be in the same subnet. Problem was, no one could figure out how to change the IPs in the field and extensive documentation and training material had already been produced. So I saved the day by eliminating the static routes and setting up a bridge group (don't ask how the change in router configs affected the documentation -- I didn't ask and no one fessed up). So it's sometimes an unintentional patch. What's more, even if they had done this on purpose, I don't think Cisco sells bridges anymore. So a router with a bridge group still would have been required. two real world situations. In my days at The Brokerage Firm, we were an IPX network. Our quote vendor did not route IPX from their quote servers. I had a small branch office thrust upon me ( a single broker and his sales assistant ) It was not cost effective to provide them with their own quote server, so I bridged to that site so they could share the home office quote server. The cost benefit analysis gave me a payback in a relatively short time. these days, I sell a number of small office RLAN's ( DSL at the remote, ATM at the central site ) In a network where there are only 10 people in the central site and 3-5 people in the remote sites, it is not worth my trouble to route. People use static IP's and generaly use their ISP for company e-mail. So I bridge a network like this. The data flow supposrts this, and since the operations are not very sophisticated, and the customers generally without a lot of cash for sophisitcated servers and services, it works out well. ( Yes there is a firewall in place at the central site ) Help! Mike L. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=60562t=60546 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
T3 FastEthernet Bridging Question
Hello, I need: Min: 1Fast Ethernet port Min: 1DS3(T3) port 45Mbps unchannelized A CAM big enough to accomodate these high speeds. I heard the 7020 7040 have the ability to use a T3(Route Switch Processor) and FE (no scalability from there, but that's OK). How will the performance compare to using a dedicated switch, like a cat 5500 or 6000 with a DS3 and FE? My boss says that the cam on the 7020 or like router would be too small to accomodate the high speeds, is this true? I have to have a DS3 or T3 and FE in the same box and I need to bridge them. This is part of a project and I need to know the best way of doing this. I have a 25K cap! Otherwise this would be much easier. Another idea I had was to get the 7020 with a T3 and FE, then have another switch and put that and the 7020 in the same vlan. I thought maybe this would compensate for the small CAM in the 7020. If what my boss said is correct, will this work? Please excuse my little knowledge and experience with the subject! If I'm way of base feel free to tell me where I'm ignorant!!! Can somebody help me? Thrown into the deep end,, Andre -- Unix Software Engineer [EMAIL PROTECTED] CNE3, 4 CCNA _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: T3 FastEthernet Bridging Question
On Thu, 19 Oct 2000, Andre Fecteau wrote: Hello, I need: Min: 1Fast Ethernet port Min: 1DS3(T3) port 45Mbps unchannelized A CAM big enough to accomodate these high speeds. I heard the 7020 7040 have the ability to use a T3(Route Switch Processor) and FE (no scalability from there, but that's OK). How will the performance compare to using a dedicated switch, like a cat 5500 or 6000 with a DS3 and FE? My boss says that the cam on the 7020 or like router would be too small to accomodate the high speeds, is this true? I have to have a DS3 or T3 and FE in the same box and I need to bridge them. This is part of a project and I need to know the best way of doing this. I have a 25K cap! Otherwise this would be much easier. If you have a $25,000 limit, then go with a 7202/7204/7206. Should fall within budget, fast, nice, well supported boxes. The 7000's get a little crazy. You have older cards, and then you have newer cards that need the RSP7000 and VIP's installed. This can get expensive. Even FE for a 7000 can get expensive, and you may end up wishing you went the 7200 route. Another idea I had was to get the 7020 with a T3 and FE, then have another switch and put that and the 7020 in the same vlan. I thought maybe this would compensate for the small CAM in the 7020. If what my boss said is correct, will this work? Please excuse my little knowledge and experience with the subject! If I'm way of base feel free to tell me where I'm ignorant!!! Can somebody help me? Thrown into the deep end,, Andre -- Unix Software Engineer [EMAIL PROTECTED] CNE3, 4 CCNA _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- Brian Feeny, CCNP, CCDP [EMAIL PROTECTED] Network Administrator ShreveNet Inc. (ASN 11881) _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question
At 3:58 PM -0500 9/30/2000, Ejay Hire wrote: Pardon me while I blatantly expose my Ignorance. From the SRB/DLSW chapter in the book "Cisco IOS Essentials". I am led to believe that DLSw only works with Token-Ring based traffic. Is this correct, or is it possible to take encapsulate (NetBios) Ethernet traffic, shuttle it accross the IP backbone, and then drop it to a remote bridge peer? Thanks, [EMAIL PROTECTED] Ejay Hire DLSW is a slightly different model than earlier ones used for nonroutable applications. Traditional models -- In traditional bridging, the original frame is passed to the destination (ignoring details like TR A bits). In translational bridging, which essentially is the LAN-only equivalent of what Cisco calls "protocol translation", a frame of one type is delivered to a medium of another type (e.g., SDLLC from SDLC to TR). That which is variously called half bridging, encapsulated bridging, remote bridging, etc., preserves the complete original frame, wraps it in a frame or packet needed for the transit medium, and delivers it to a receiver of the same frame type. This is also called protocol tunneling. If the original frame is tunneled to a receiver that translates it to a frame of a different type (e.g., Ethernet via TCP/IP to TR), this is an extension of both protocol translation and tunneling (e.g., SDLLC over RSRB). Newer models DLSW does not preserve the entire frame. At each end of the DLSW tunnel, layer 2 information is stripped off, and only the frame data field are encapsulated, typically in TCP/IP, and then sent to the destination. At the destination, the user data in the packet are reframed into whatever frame type is used by the destination. The data links at both ends are completely independent. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question
DLSW does indeed transport additional protocols. - Original Message - From: Ejay Hire [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, September 30, 2000 1:58 PM Subject: Bridging Question Pardon me while I blatantly expose my Ignorance. From the SRB/DLSW chapter in the book "Cisco IOS Essentials". I am led to believe that DLSw only works with Token-Ring based traffic. Is this correct, or is it possible to take encapsulate (NetBios) Ethernet traffic, shuttle it accross the IP backbone, and then drop it to a remote bridge peer? Thanks, [EMAIL PROTECTED] Ejay Hire CCNA seeking internetworking employment. (Not just because I'm at work on Saturday...) _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question
DLSW does indeed transport additional protocols. - Original Message - From: Ejay Hire [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, September 30, 2000 1:58 PM Subject: Bridging Question Pardon me while I blatantly expose my Ignorance. From the SRB/DLSW chapter in the book "Cisco IOS Essentials". I am led to believe that DLSw only works with Token-Ring based traffic. Is this correct, or is it possible to take encapsulate (NetBios) Ethernet traffic, shuttle it accross the IP backbone, and then drop it to a remote bridge peer? Thanks, [EMAIL PROTECTED] Ejay Hire CCNA seeking internetworking employment. (Not just because I'm at work on Saturday...) _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Bridging Question
Check out:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ibm_c/bcprt2/bcddlsw.htm#xtocid2213520
Clue
On 30 Sep 2000 17:01:40 -0400, [EMAIL PROTECTED] ("Ejay Hire")
wrote:
Pardon me while I blatantly expose my Ignorance.
From the SRB/DLSW chapter in the book "Cisco IOS Essentials". I am led to
believe that DLSw only works with Token-Ring based traffic. Is this
correct, or is it possible to take encapsulate (NetBios) Ethernet traffic,
shuttle it accross the IP backbone, and then drop it to a remote bridge
peer?
Thanks,
[EMAIL PROTECTED]
Ejay Hire
CCNA seeking internetworking employment. (Not just because I'm at work on
Saturday...)
_
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
Share information about yourself, create your own public profile at
http://profiles.msn.com.
**NOTE: New CCNA/CCDA List has been formed. For more information go to
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Integrated Routing and Bridging Question
I've posted this a few times and haven't gotten a response. Maybe someone will pick it up on the third try... You may remember that a while back I was asking questions about using the BVI interface on a 2948G-L3. I got a ton of great feedback from the group, and as a result I am now successfully testing the 2948G-L3. My question now is as follows: I will be connecting the 2948G-L3 to a plain 'ol 2948G. I am going to use IRB as suggested by the group. How can I bridge non-IP traffic between the BVI interfaces? Specifically, I would like to bridge IPX and LLC traffic between the BVI interfaces (two at least), but route IP between them. On a router I've done this by placing the physical interfaces between which I want to bridge non-routed traffic (IPX and LLC) in the same bridge group. I'm at a loss as to how I can do this on the 2948G-L3. If I had to, I could certainly route IPX, but this still leaves me with the problem of bridging LLC between the BVI interfaces. Thanks in advance, Lorenzo ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
