VTP Domain Server Question [7:70942]
I have a question regarding VTP. I am working with a network configuration that has dual 6509's as core switches. One is the VTP domain server, the other is a VTP domain client. All other 4000 switches are defined as client also. I need to take both 6509's down to upgrade the Cat-OS on them, however I am concerned about what happens to the other switches when the VTP domain server goes away while the other 6509 is in client mode. I know that I can assign multiple VTP servers to a domain. My original thought is to first make sure that the client 6509 is running the same VTP revision # as the server 6509. Then I should be able to change the client 6509 to VTP server mode. Then in theory either server can take over VTP responsibilites, because one will be able to act as the other if the other one goes away. What I was also wondering, do all VLAN's go disabled if I were to only have a single VTP server and shut it down when the rest of the switches are clients? If so, would this happen right away, or after 5 minutes? If I take the 6509 server down, it will not be able to tell anyone that a topology change has occurred, but will the clients be looking for the VTP 5 minute updates? If anyone could help clarify this, I would appreciate it. Thanks. Dave C. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70942&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
VTP Domain Server Question [7:70942]
I have a question regarding VTP. I am working with a network configuration that has dual 6509's as core switches. One is the VTP domain server, the other is a VTP domain client. All other 4000 switches are defined as client also. I need to take both 6509's down to upgrade the Cat-OS on them, however I am concerned about what happens to the other switches when the VTP domain server goes away while the other 6509 is in client mode. I know that I can assign multiple VTP servers to a domain. My original thought is to first make sure that the client 6509 is running the same VTP revision # as the server 6509. Then I should be able to change the client 6509 to VTP server mode. Then in theory either server can take over VTP responsibilites, because one will be able to act as the other if the other one goes away. What I was also wondering, do all VLAN's go disabled if I were to only have a single VTP server and shut it down when the rest of the switches are clients? If so, would this happen right away, or after 5 minutes? If I take the 6509 server down, it will not be able to tell anyone that a topology change has occurred, but will the clients be looking for the VTP 5 minute updates? If anyone could help clarify this, I would appreciate it. Thanks. Dave C. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70949&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VTP Domain Server Question [7:70942]
Once you take the VTP server down all vlans will basically go down. Which will bring down the network with only one VTP server. They will sit there and do nothing until the vtp server comes back online. It would be a good idea to have two VTP servers so you can take them down one at a time and upgrade. I must assume the 2 6509's or for you core routing and the 4006's are your closet access switches. If the other standby 6509 is a client in the same VTP domain as you server which I don't see why it would not be, they already that the same VTP revision all you have to do is promote the client 6509 to server. set vtp domain (Domain Name) mode server Then you have two servers. You must have the 4006's dual ran to both 6509's to work... Ronnie ""Dave C."" wrote in message news:[EMAIL PROTECTED] > I have a question regarding VTP. > > I am working with a network configuration that has dual 6509's as core > switches. One is the VTP domain server, the other is a VTP domain client. > All other 4000 switches are defined as client also. > > I need to take both 6509's down to upgrade the Cat-OS on them, however I am > concerned about what happens to the other switches when the VTP domain > server goes away while the other 6509 is in client mode. > > I know that I can assign multiple VTP servers to a domain. My original > thought is to first make sure that the client 6509 is running the same VTP > revision # as the server 6509. Then I should be able to change the client > 6509 to VTP server mode. Then in theory either server can take over VTP > responsibilites, because one will be able to act as the other if the other > one goes away. > > What I was also wondering, do all VLAN's go disabled if I were to only have > a single VTP server and shut it down when the rest of the switches are > clients? If so, would this happen right away, or after 5 minutes? If I take > the 6509 server down, it will not be able to tell anyone that a topology > change has occurred, but will the clients be looking for the VTP 5 minute > updates? > > If anyone could help clarify this, I would appreciate it. > > Thanks. > > Dave C. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70943&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VTP Domain Server Question [7:70942]
Once you take the VTP server down all vlans will basically go down. Which will bring down the network with only one VTP server. They will sit there and do nothing until the vtp server comes back online. It would be a good idea to have two VTP servers so you can take them down one at a time and upgrade. I must assume the 2 6509's or for you core routing and the 4006's are your closet access switches. If the other standby 6509 is a client in the same VTP domain as you server which I don't see why it would not be, they already that the same VTP revision all you have to do is promote the client 6509 to server. set vtp domain (Domain Name) mode server Then you have two servers. You must have the 4006's dual ran to both 6509's to work... Ronnie ""Dave C."" wrote in message news:[EMAIL PROTECTED] > I have a question regarding VTP. > > I am working with a network configuration that has dual 6509's as core > switches. One is the VTP domain server, the other is a VTP domain client. > All other 4000 switches are defined as client also. > > I need to take both 6509's down to upgrade the Cat-OS on them, however I am > concerned about what happens to the other switches when the VTP domain > server goes away while the other 6509 is in client mode. > > I know that I can assign multiple VTP servers to a domain. My original > thought is to first make sure that the client 6509 is running the same VTP > revision # as the server 6509. Then I should be able to change the client > 6509 to VTP server mode. Then in theory either server can take over VTP > responsibilites, because one will be able to act as the other if the other > one goes away. > > What I was also wondering, do all VLAN's go disabled if I were to only have > a single VTP server and shut it down when the rest of the switches are > clients? If so, would this happen right away, or after 5 minutes? If I take > the 6509 server down, it will not be able to tell anyone that a topology > change has occurred, but will the clients be looking for the VTP 5 minute > updates? > > If anyone could help clarify this, I would appreciate it. > > Thanks. > > Dave C. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70950&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VTP Domain Server Question [7:70942]
""Ronnie Higginbotham"" wrote in message news:[EMAIL PROTECTED] > Once you take the VTP server down all vlans will basically go down. Which > will bring down the network with only one VTP server. They will sit there > and do nothing until the vtp server comes back online. Is this right? I got to wondering about this, but I don't have enough equipment to simulate a real network to test end to end. What I did do was take my two switches, set one as the VTP server, the other as the client, create some vlans on the server, assigning those vlans to ports on the client switch, shut down the trunk ports between the two switches, and watch. I'm not sure how long I need to wait, but what I am seeing ( or not seeing ) confirms my suspicion - that the assigned ports on the client switch remain functional. My trunks are down on the client switch, but that is expected in this setup. What I am unable to test is whether or not the trunks, over which vlan information is propagated, will still function in the scenario described. I suppose you are correct when you say that "all vlans will basically go down". Certainly, in my simulation, no one on a local switch could get to the core. What I am wondering is in a dual core switch situation as described, if servers and services were dual homed to the redundant switches, if all would remain well. Certainly no new vlans could be added, but I'm wondering if all else would remain functioning. some info on the switch Switch_48#sh vtp stat VTP Version : 2 Configuration Revision : 2 Maximum VLANs supported locally : 1005 Number of existing VLANs: 12 VTP Operating Mode : Client Switch_48#sh vlan VLAN Name StatusPorts - --- 1default activeFa0/4, Fa0/5, Fa0/6, Fa0/7 Fa0/11, Fa0/12, Fa0/13, Fa0/14 edited for brevety 10 VLAN0010 activeFa0/10 20 VLAN0020 activeFa0/20 30 VLAN0030 activeFa0/8, Fa0/30 40 VLAN0040 activeFa0/40 100 VLAN0100 activeFa0/1 200 VLAN0200 activeFa0/2 300 VLAN0300 activeFa0/3 1002 fddi-default active 1003 trcrf-defaultactive --M Switch_48#sh int trunk Switch_48# ( demonstrating that the trunk is down ) As I said, with two switches, I can't test a real world. However, I suspect that if the network is properly design, with dual homing of servers and services, and dual home of the access closets to the core switch, that things might just be fine. Can anyone provide info in a more realistic simulation? >It would be a good > idea to have two VTP servers so you can take them down one at a time and > upgrade. always a good idea. > I must assume the 2 6509's or for you core routing and the 4006's > are your closet access switches. > > If the other standby 6509 is a client in the same VTP domain as you server > which I don't see why it would not be, they already that the same VTP > revision all you have to do is promote the client 6509 to server. > > set vtp domain (Domain Name) mode server > > Then you have two servers. You must have the 4006's dual ran to both 6509's > to work... > > Ronnie > > ""Dave C."" wrote in message > news:[EMAIL PROTECTED] > > I have a question regarding VTP. > > > > I am working with a network configuration that has dual 6509's as core > > switches. One is the VTP domain server, the other is a VTP domain client. > > All other 4000 switches are defined as client also. > > > > I need to take both 6509's down to upgrade the Cat-OS on them, however I > am > > concerned about what happens to the other switches when the VTP domain > > server goes away while the other 6509 is in client mode. > > > > I know that I can assign multiple VTP servers to a domain. My original > > thought is to first make sure that the client 6509 is running the same VTP > > revision # as the server 6509. Then I should be able to change the client > > 6509 to VTP server mode. Then in theory either server can take over VTP > > responsibilites, because one will be able to act as the other if the other > > one goes away. > > > > What I was also wondering, do all VLAN's go disabled if I were to only > have > > a single VTP server and shut it down when the rest of the switches are > > clients? If so, would this happen right away, or after 5 minutes? If I > take > > the 6509 server down, it will not be able to tell anyone that a topology > > change has occurred, but will the clients be looking for the VTP 5 minute > > updates? > > > > If anyone could help clarify this, I would appreciate it. > > > > Thanks. > > > > Dave C. Message Posted at: http://www.groupstudy.com/fo
Re: VTP Domain Server Question [7:70942]
Dave, You are correct. Same setup I have working on many 6509's and 4006's today. 4006's dual ran to each 6509. Each 6509 is my VTP Server. I can take one completely down for maintenance or whatever and it will never miss a packet. Under than the first 50 seconds for spanning tree to go from a listening---learning-forwarding state... When I said "Vlans would basically go down" What I meant is with you VTP server down no vlan routing can take place because the server announcing that vlan is down. If you were to have 2 clients on different vlans on a 4006 and you take down your VTP server. Client A in VLAN A could not get to Client B in Vlan B. All local vlan traffic would work on the 4006 because it is locally switched but it cannot route vlans. Ronnie ""The Road Goes Ever On"" wrote in message news:[EMAIL PROTECTED] > ""Ronnie Higginbotham"" wrote in message > news:[EMAIL PROTECTED] > > Once you take the VTP server down all vlans will basically go down. Which > > will bring down the network with only one VTP server. They will sit there > > and do nothing until the vtp server comes back online. > > Is this right? I got to wondering about this, but I don't have enough > equipment to simulate a real network to test end to end. > > What I did do was take my two switches, set one as the VTP server, the other > as the client, create some vlans on the server, assigning those vlans to > ports on the client switch, shut down the trunk ports between the two > switches, and watch. > > I'm not sure how long I need to wait, but what I am seeing ( or not seeing ) > confirms my suspicion - that the assigned ports on the client switch remain > functional. > > My trunks are down on the client switch, but that is expected in this setup. > > What I am unable to test is whether or not the trunks, over which vlan > information is propagated, will still function in the scenario described. > > I suppose you are correct when you say that "all vlans will basically go > down". Certainly, in my simulation, no one on a local switch could get to > the core. What I am wondering is in a dual core switch situation as > described, if servers and services were dual homed to the redundant > switches, if all would remain well. Certainly no new vlans could be added, > but I'm wondering if all else would remain functioning. > > some info on the switch > > Switch_48#sh vtp stat > VTP Version : 2 > Configuration Revision : 2 > Maximum VLANs supported locally : 1005 > Number of existing VLANs: 12 > VTP Operating Mode : Client > > Switch_48#sh vlan > > VLAN Name StatusPorts > - -- -- > --- > 1default activeFa0/4, Fa0/5, Fa0/6, Fa0/7 > Fa0/11, Fa0/12, Fa0/13, > Fa0/14 >edited for brevety > > 10 VLAN0010 activeFa0/10 > 20 VLAN0020 activeFa0/20 > 30 VLAN0030 activeFa0/8, Fa0/30 > 40 VLAN0040 activeFa0/40 > 100 VLAN0100 activeFa0/1 > 200 VLAN0200 activeFa0/2 > 300 VLAN0300 activeFa0/3 > 1002 fddi-default active > 1003 trcrf-defaultactive > --M > > Switch_48#sh int trunk > > Switch_48# ( demonstrating that the trunk is down ) > > > As I said, with two switches, I can't test a real world. However, I suspect > that if the network is properly design, with dual homing of servers and > services, and dual home of the access closets to the core switch, that > things might just be fine. > > Can anyone provide info in a more realistic simulation? > > > >It would be a good > > idea to have two VTP servers so you can take them down one at a time and > > upgrade. > > always a good idea. > > > I must assume the 2 6509's or for you core routing and the 4006's > > are your closet access switches. > > > > If the other standby 6509 is a client in the same VTP domain as you server > > which I don't see why it would not be, they already that the same VTP > > revision all you have to do is promote the client 6509 to server. > > > > set vtp domain (Domain Name) mode server > > > > Then you have two servers. You must have the 4006's dual ran to both > 6509's > > to work... > > > > Ronnie > > > > ""Dave C."" wrote in message > > news:[EMAIL PROTECTED] > > > I have a question regarding VTP. > > > > > > I am working with a network configuration that has dual 6509's as core > > > switches. One is the VTP domain server, the other is a VTP domain > client. > > > All other 4000 switches are defined as client also. > > > > > > I need to take both 6509's down to upgrade the Cat-OS on them, however I > > am > > > concerned about what happens to the other switches when the VTP domain >
Re: VTP Domain Server Question [7:70942]
Dave, Comments are inline. - Tom Dave C. wrote: > I have a question regarding VTP. > > I am working with a network configuration that has dual 6509's as core > switches. One is the VTP domain server, the other is a VTP domain client. > All other 4000 switches are defined as client also. > > I need to take both 6509's down to upgrade the Cat-OS on them, however I am > concerned about what happens to the other switches when the VTP domain > server goes away while the other 6509 is in client mode. You will not have ANY problems taking down the VTP servers and leaving only clients in your network. VTP server and VTP clients perform almost identical roles. The only difference between the two is that you can console (or Telnet) in to make VLAN and VTP modifications on a VTP server, VTP clients must learn their changes from other switches in the network. VTP clients learn, remember (while they have power anyway) and propagate VTP information, just as VTP servers do. Your other switches will not be affected while the VTP servers are offline, aside from obvious connectivity limitations. :) > > I know that I can assign multiple VTP servers to a domain. My original > thought is to first make sure that the client 6509 is running the same VTP > revision # as the server 6509. Then I should be able to change the client > 6509 to VTP server mode. Then in theory either server can take over VTP > responsibilites, because one will be able to act as the other if the other > one goes away. You can have multiple servers in the VTP domain, but there is no "take over" responsibilities functionality. VTP servers and VTP clients both learn and propagate VTP information. VTP servers will learn VTP information from clients (assuming the client has a higher revision number) just like VTP clients will learn VTP from VTP servers (assuming the server has a higher revision number). You need at least one VTP server in your network, since the VTP server remembers its VTP information between reboots (also you need at least one switch in your network where you can change VLAN information, right? :) Once you have chosen at least one switch to be a VTP server, the remaining switches in your network can be VTP clients or VTP servers. There are some notable design and redundancy issues with having only a single VTP server -- but network functionality will not be affected. I think that VTP client is supposed to be a security safeguard, keeping changes from being made except from "authorized" (VTP server) switches. But that has never really make sense to me since you need to be in enable mode to change VLAN information anyway. If you have access to enable mode you can just as easily change the switch to VTP server, make your changes, then change the mode back to client. There's no real security advantage. > > What I was also wondering, do all VLAN's go disabled if I were to only have > a single VTP server and shut it down when the rest of the switches are > clients? If so, would this happen right away, or after 5 minutes? If I take > the 6509 server down, it will not be able to tell anyone that a topology > change has occurred, but will the clients be looking for the VTP 5 minute > updates? > VLANs will not be disabled unless you power off all of your VTP servers and reboot all of your VTP clients at the same time. > If anyone could help clarify this, I would appreciate it. Based on the other posts, I seem to be going against conventional thinking. If you need further clarification, I can provide CCO links. > > Thanks. > > Dave C. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70971&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VTP Domain Server Question [7:70942]
Hi, you can take the VTP server down and you will have no problem. On the VTP server you configure VLANs and VTP propagates the configured VLANs from the server to the clients. Without a VTP server all VLANs will work. You can run a network without a VTP server. In this case you have to configure the VLANs on all switches manually. VTP (VLAN trunking protocol) does not handle trunking. The name is misleading. It is a management protocol running only on trunk ports of the switches. Nevertheless it is usefull to have two VTP servers instead of one for availability. VTP is not propageted via routers or Layer 3 switch ports. It is limited to a broadcast domain. With kind regards Jens Neelsen --- Ronnie Higginbotham wrote: > Once you take the VTP server down all vlans will basically go > down. Which > will bring down the network with only one VTP server. They > will sit there > and do nothing until the vtp server comes back online. It > would be a good > idea to have two VTP servers so you can take them down one at > a time and > upgrade. I must assume the 2 6509's or for you core routing > and the 4006's > are your closet access switches. > > If the other standby 6509 is a client in the same VTP domain > as you server > which I don't see why it would not be, they already that the > same VTP > revision all you have to do is promote the client 6509 to > server. > > set vtp domain (Domain Name) mode server > > Then you have two servers. You must have the 4006's dual ran > to both 6509's > to work... > > Ronnie > > ""Dave C."" wrote in message > news:[EMAIL PROTECTED] > > I have a question regarding VTP. > > > > I am working with a network configuration that has dual > 6509's as core > > switches. One is the VTP domain server, the other is a VTP > domain client. > > All other 4000 switches are defined as client also. > > > > I need to take both 6509's down to upgrade the Cat-OS on > them, however I > am > > concerned about what happens to the other switches when the > VTP domain > > server goes away while the other 6509 is in client mode. > > > > I know that I can assign multiple VTP servers to a domain. > My original > > thought is to first make sure that the client 6509 is > running the same VTP > > revision # as the server 6509. Then I should be able to > change the client > > 6509 to VTP server mode. Then in theory either server can > take over VTP > > responsibilites, because one will be able to act as the > other if the other > > one goes away. > > > > What I was also wondering, do all VLAN's go disabled if I > were to only > have > > a single VTP server and shut it down when the rest of the > switches are > > clients? If so, would this happen right away, or after 5 > minutes? If I > take > > the 6509 server down, it will not be able to tell anyone > that a topology > > change has occurred, but will the clients be looking for the > VTP 5 minute > > updates? > > > > If anyone could help clarify this, I would appreciate it. > > > > Thanks. > > > > Dave C. [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70997&t=70942 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
