RE: ip classless and default route [7:53231]

2002-09-12 Thread cebuano
Hmm, Try removing your static 0.0.0.0 and you'll see why. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 12, 2002 8:57 PM To: [EMAIL PROTECTED] Subject: ip classless and default route [7:53231] according to many books, ip clas

Re: ip classless and default route [7:53231]

2002-09-12 Thread Erick B.
It will work fine for any destination other then 210.210.210.x/24 which is the classful network for your IP subnet. A better real-world internet example with no ip classless and internet connections would be, if you had a 64.x.x.x subnet on the serial and similar on LAN side. In this case

RE: ip classless and default route [7:53231]

2002-09-12 Thread Priscilla Oppenheimer
You don't need the "ip classless" command because your default route points to an unnumbered serial interface. If instead it pointed to an IP address that was in the same class as your local Ethernet, then you would have a problem. Here's the classic example: e0 RouterA

ip classless and default route [7:53231]

2002-09-12 Thread YI Zhou
according to many books, ip classless should be used to be able to use default route. but I just found my internet router, actually has no ip classless. which means I am using classful route lookup. And this is working fine,who can explain why note that ip address here is not real one

Re: IP classless command [7:30056]

2001-12-26 Thread Dan Garfield
days, ISPs have possession of various address blocks which they divvy up as needed to their customers. So its absolutely common for the various subnets of a particular classful address block to be split up amongst multiple organizations. So the ip classless command was used to get around this defaul

RE: IP classless command [7:30056]

2001-12-25 Thread [EMAIL PROTECTED]
Brilliant! Pierre-Alex -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Bernard Omrani Sent: Tuesday, December 25, 2001 7:21 PM To: [EMAIL PROTECTED] Subject: RE: IP classless command [7:30056] For a simple explanation if IP classless, see: http

RE: IP classless command [7:30056]

2001-12-25 Thread Bernard Omrani
For a simple explanation if IP classless, see: http://www.networkking.net/out/ipclassless.htm Bernard > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, December 25, 2001 12:41 PM > To: [EMAIL PROTECTED] > Subject: Re: IP class

RE: IP classless command [7:30056]

2001-12-25 Thread Dave
Hunt, With "no ip classless" configured, the router assumes classful behavior. If it has any route at all to a network it assumes that it has routing to all of that major network (this is why RIP has such problems with discontiginous networks). If it receives a packet destined f

Re: IP classless command [7:30056]

2001-12-25 Thread Hunt Lee
Hello Mike. thanks so much for your detailed explanation. However, I'm still confused about how the ip classless works. I understand that "classful" rules (if no ip classless is configured), with the 10.1.1.0/24 static route, it would forward anything from 10.1.1.1 to 10.1.1.254

Re: IP classless command [7:30056]

2001-12-25 Thread Michael Paulson
IP CLASSLESS is a little hard to understand. Even Cisco is very vague on this. Once a TAC engineer just told me that the command just makes routing better. Here is what I believe happens. If you don't have the "IP CLASSLESS" command defined in a Cisco router then the router w

Re: IP classless command [7:30056]

2001-12-24 Thread Mr. Richard L. Pickard
12/24/2001 5:35pm Monday Well said - Original Message - From: ""Mike"" Newsgroups: groupstudy.cisco Sent: Monday, December 24, 2001 5:35 PM Subject: Re: IP classless command [7:30056] > The best way to explain IP classless is to explain how a router works

Re: IP classless command [7:30056]

2001-12-24 Thread Mike
The best way to explain IP classless is to explain how a router works with "no ip classless". Suppose you have a router with a static route configured to 10.1.1.0/24 out some interface and you also have a default gateway configured. Again, ip classless is disabled, "no ip classl

IP classless command [7:30056]

2001-12-24 Thread Hunt Lee
Can anyone please explain to me what is "ip classless" used for? I looked it up on the Caslow book, and it states that by enabling IP classless, it allows one to override the contiguous subnet rule and allow the router to look for the longest match beyond the listed subnets. But I s

Re: no ip classless [7:7100]

2001-06-04 Thread Peter Van Oene
Search the archives for 2-3 iterations of the discussion culminating with Chuck doing some heavy lab work. Peter *** REPLY SEPARATOR *** On 6/4/2001 at 5:15 PM Doug Lockwood wrote: >Tom; > >I think a discussion on this will be interesting. >My perseption is that a classful/cl

Re: no ip classless [7:7100]

2001-06-04 Thread Doug Lockwood
Tom; I think a discussion on this will be interesting. My perseption is that a classful/classless router has nothing to do with VLSM or CIDR. The only issue is how it handles the default route on networks that are attached to the router with at least one interface. Classless - attached net, sub

Re: no ip classless [7:7100]

2001-06-04 Thread Tom Pruneau
Cisco routers by default are still classfull, even though the internet has long since gone classless. For a router to effective understand CIDR routes that don't fall on classfull boundrys it is necessary to turn off the default by executing the command ip classless If for some reason you

RE: no ip classless [7:7100]

2001-06-04 Thread Doug Lockwood
If you were running RIP V1 on your network, correct design would dictate that all the local networks "must" appear in the routing table of your routers. If one of your users accesses a network not in the table, the router would send an icmp "network unreachable" with no IP c

no ip classless [7:7100]

2001-06-04 Thread [EMAIL PROTECTED]
In what situation would you use the command "no ip classless"? Cisco's site says ip classless --- This command allows the software to forward packets that are destined for unrecognized subnets of directly connected networks. The packets are forwarded to the best supernet route.

Re: What is the use of "ip classless" command in classful [7:4844]

2001-05-17 Thread John Neiberger
This has been covered in depth a few different times. Check the archives and you'll find a few different threads that cover the operation of 'ip classless' and 'no ip classless'. If you don't know what they do, use 'ip classless' and forget about it.

What is the use of "ip classless" command in classful networks? [7:4828]

2001-05-17 Thread Brijesh
Hi, Please tell me what is the use of "ip classless" command in classful networks? I have read somewhere that When using classful routing protocols such as RIP or IGRP, use "ip classless" command if you want it to also match unknown subnets of known networks. Can anybody

Re: ANSWER: OSPF overrides 'no ip classless' [7:1758]

2001-04-24 Thread John Neiberger
... > I have received results from a TAC case about this familiar issue. For > those coming late to the picnic, the issue was that the presence of OSPF > or IS-IS overrides 'no ip classless' in the router configuration and > would force the router to behave classlessly. The TAC e

Re: ANSWER: OSPF overrides 'no ip classless' [7:1758]

2001-04-24 Thread James Haynes
TECTED]... > > I have received results from a TAC case about this familiar issue. > For > > those coming late to the picnic, the issue was that the presence of > OSPF > > or IS-IS overrides 'no ip classless' in the router configuration and > > would force the

Re: ANSWER: OSPF overrides 'no ip classless' [7:1758]

2001-04-24 Thread James Haynes
ot;>news:[EMAIL PROTECTED]... > I have received results from a TAC case about this familiar issue. For > those coming late to the picnic, the issue was that the presence of OSPF > or IS-IS overrides 'no ip classless' in the router configuration and > would force the router to beha

ANSWER: OSPF overrides 'no ip classless' [7:1758]

2001-04-24 Thread John Neiberger
I have received results from a TAC case about this familiar issue. For those coming late to the picnic, the issue was that the presence of OSPF or IS-IS overrides 'no ip classless' in the router configuration and would force the router to behave classlessly. The TAC engineer consulted

RE: IP Classless [7:616]

2001-04-14 Thread Bob Vance
nk. Note that this will "work" for all addresses within all, even unknown, subnets of 10.0.0.0/8, even with no ip classless set. However, neither no ip classless ip route 8.0.0.0 128.0.0.0 10.10.32.0 nor no ip classless ip route 0.0.0.0 0.0.0.0 10.10.32.0 !(the "c

Re: IP Classless

2001-04-09 Thread Priscilla Oppenheimer
At 12:21 AM 4/9/01, EA Louie wrote: >no ip classless means route IP over classful boundaries - you'll have to do >your homework to learn the Class A, Class B, and Class C network prefixes >though, mate ;-) However, 10.0.0.0 is a private (RFC 1918), >non-Internet-routeabl

Re: IP Classless

2001-04-09 Thread EA Louie
no ip classless means route IP over classful boundaries - you'll have to do your homework to learn the Class A, Class B, and Class C network prefixes though, mate ;-) However, 10.0.0.0 is a private (RFC 1918), non-Internet-routeable Class A network the route statement means that the rou

IP Classless

2001-04-08 Thread John Brandis
no ip classless ip route 10.0.0.0 255.0.0.0 10.10.32.0 Whats this mean Thanks _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-04-02 Thread Allen May
I don't get it. - Original Message - From: "Jason Leonard" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 30, 2001 11:57 PM Subject: Re: The Finale: OSPF and IP Classless (partial retraction) > > Nope, 'cause blonde (with the &#

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-04-02 Thread Allen May
at it doesn't understand and say 'I don't get it. Go away.'. Thus...blonde ACLs. - Original Message - From: "Howard C. Berkowitz" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 30, 2001 4:41 PM Subject: Re: The Finale: OSPF and IP Cla

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Jason Leonard
Nope, 'cause blonde (with the 'e') refers for female routing engineers. Or, rather, females in general. But be wary even using to refer to females.. "Usage Note: It is usual in English to treat blond as if it required gender marking, as in French, spelling it blonde when referring to women and

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Howard C. Berkowitz
>I'm blonde. I don't get it. Does that mean that the reason that (male) blonde routing engineers get better as they age, not from experience but from male pattern baldness? _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Allen May
I'm blonde. I don't get it. - Original Message - From: "Bob Vance" <[EMAIL PROTECTED]> To: "CISCO_GroupStudy List (E-mail)" <[EMAIL PROTECTED]> Sent: Friday, March 30, 2001 1:11 PM Subject: RE: The Finale: OSPF and IP Classless (partia

RE: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Kane, Christopher A.
Since the solution points to adding "ip classless", my question would be: When would someone use/need to have "no ip classless". Does anyone use "no ip classless" as a standard in their configurations? And if so, what is gained? Christopher A. Kane, CCNP Senior N

RE: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Bob Vance
ield Dr. Fax 770-623-3429   Duluth, GA 30097-1511 = -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED]] Sent: Friday, March 30, 2001 1:40 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: RE: The Finale: OSPF and IP Clas

RE: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread John Neiberger
that particular point. The moral of the story is: always use 'ip classless' and then quit worrying about it. >From here onward I will no longer refer to 'ip classless'.it is now 'ip clueless'. :-) >>> "Bob Vance" <[EMAIL PROTECTED]>

RE: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread Bob Vance
Actually, John my treatises :) on this subject a year ago showed this. ip classless *only* affects the lookups *outside* the classful aggregate. Any supernet *within* the classful aggregate *will* be used, even with no ip classless set. Thus, a learned route, 10.1.0.0/16 , will be used

Re: The Finale: OSPF and IP Classless

2001-03-30 Thread John Neiberger
In my testing, I found exactly the opposite, which is why all of this is so odd. With 'no ip classless' configured and using EIGRP to originate a default from Router A into Router B, B would still behave classfully in its route lookups. It would *not* use a supernet route for desti

Re: The Finale: OSPF and IP Classless (partial retraction)

2001-03-30 Thread John Neiberger
? So, just as in my experiments, the router behaves classlessly up to a point. In this example, it would use the major network supernet route but still would not be able to use the 0.0.0.0/0 supernet, right? Good grief. I'm just going to leave 'ip classless' on all the time and

Re: The Finale: OSPF and IP Classless

2001-03-30 Thread R.Srikanth
Hi John, I would like to add another point to your observation. With 'no ip classless' , EIGRP also behaves the same way as OSPF when you have a supernet for the specific major net. > Now for the really interesting part (if you've read this far and are still > awake!) I s

The Finale: OSPF and IP Classless

2001-03-29 Thread John Neiberger
A is originating a default into B. Router B has 'no ip classless' configured. This means that by Cisco's explanations, if I were to ping any unknown subnet of 10.0.0.0/8 it would fail and debugging would show that it was unroutable. However, that wasn't happening. If I

RE: FW: UPDATE: OSPF overriding 'no ip classless'

2001-03-29 Thread John Neiberger
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John Neiberger Sent: Thursday, March 29, 2001 10:16 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: FW: UPDATE: OSPF overriding 'no ip classless' Well, there are two different issues

RE: FW: UPDATE: OSPF overriding 'no ip classless'

2001-03-29 Thread Bob Vance
2001 10:16 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: FW: UPDATE: OSPF overriding 'no ip classless' Well, there are two different issues. You're talking about the way the routing protocols themselves behave: whether they pass subnet mask information or not. The

Re: FW: UPDATE: OSPF overriding 'no ip classless'

2001-03-29 Thread John Neiberger
Well, there are two different issues. You're talking about the way the routing protocols themselves behave: whether they pass subnet mask information or not. The issue here is routing table lookups, not how those routes are installed. With 'no ip classless' configured, eve

RE: UPDATE: OSPF overriding 'no ip classless'

2001-03-29 Thread Bob Vance
12:23 AM To: [EMAIL PROTECTED] Subject: UPDATE: OSPF overriding 'no ip classless' Okay, here are my latest findings. Bob and others wanted me to try various supernet routes to see how the routers reacted. Well, I did, and the router with 'no ip classless' is definitely b

UPDATE: OSPF overriding 'no ip classless'

2001-03-28 Thread John Neiberger
Okay, here are my latest findings. Bob and others wanted me to try various supernet routes to see how the routers reacted. Well, I did, and the router with 'no ip classless' is definitely behaving classlessly when OSPF is running. First, a recap. I have router A connected to route

RE: OSPF overrides "no ip classless"

2001-03-28 Thread John Neiberger
I think you're right! All DRAM and no flashor is that the other way around? Maybe I'm all DRAM and no NVRAM, that's more like it. > >Now that I think about it, I believe I did try 10.0.0.0/8 and it still > >behaved classfully, even running OSPF. I'll try it again to make sure, > >tho

RE: OSPF overrides "no ip classless"

2001-03-28 Thread Howard C. Berkowitz
>Now that I think about it, I believe I did try 10.0.0.0/8 and it still >behaved classfully, even running OSPF. I'll try it again to make sure, >though. I'm only 30 and my memory is already failing me. > >John I'll bet your memory isn't from a Cisco-approved supplier. See what happens? > >>

RE: OSPF overrides "no ip classless"

2001-03-28 Thread Bob Vance
PROTECTED] Cc: [EMAIL PROTECTED] Subject: RE: OSPF overrides "no ip classless" Now that I think about it, I believe I did try 10.0.0.0/8 and it still behaved classfully, even running OSPF. I'll try it again to make sure, though. I'm only 30 and my memory is already failing me.

RE: OSPF overrides "no ip classless"

2001-03-28 Thread John Neiberger
OTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John Neiberger Sent: Tuesday, March 27, 2001 11:19 PM To: [EMAIL PROTECTED] Subject: OSPF overrides "no ip classless" If you recall our recent thread on this, I was noticing that when ospf would advertise a default route to another router, t

RE: OSPF overrides "no ip classless"

2001-03-28 Thread Bob Vance
o:[EMAIL PROTECTED]]On Behalf Of John Neiberger Sent: Tuesday, March 27, 2001 11:19 PM To: [EMAIL PROTECTED] Subject: OSPF overrides "no ip classless" If you recall our recent thread on this, I was noticing that when ospf would advertise a default route to another router, the receiving rou

Re: More Info (OSPF and IP Classless)

2001-03-28 Thread John Neiberger
would have an effect here, but who knows... John > Just want to see the result by using different type of area. > > By using ospf routing protocol with no ip classless, the route distribute > from the other > router behave ip classless. > > PS. Did you read the other

Re: More Info (OSPF and IP Classless)

2001-03-27 Thread wind
Just want to see the result by using different type of area. By using ospf routing protocol with no ip classless, the route distribute from the other router behave ip classless. PS. Did you read the other thread ""Katson PN Yeung"" <[EMAIL PROTECTED]> ¼¶¼g©ó¶l¥ó 9

Re: More Info (OSPF and IP Classless)

2001-03-27 Thread Katson PN Yeung
"ip classless" or "no ip classless" only affect the way the router lookup the ip route table. It does not related to how you define the ospf area or how you redistribute the route (inc the default route). ""wind"" <[EMAIL PROTECTED]> wrote in mes

Re: More Info (OSPF and IP Classless)

2001-03-27 Thread wind
hat my understanding of 'no ip classless' is > correct! > > http://www.cisco.com/warp/public/105/21.html > > So, referring to my other threads, why is OSPF overriding classfull routing > table lookups? I'd rather not retype the whole thing, so if you'd like the

More Info (OSPF and IP Classless)

2001-03-27 Thread John Neiberger
Here is a link verifying that my understanding of 'no ip classless' is correct! http://www.cisco.com/warp/public/105/21.html So, referring to my other threads, why is OSPF overriding classfull routing table lookups? I'd rather not retype the whole thing, so if you'd li

OSPF overrides "no ip classless"

2001-03-27 Thread John Neiberger
If you recall our recent thread on this, I was noticing that when ospf would advertise a default route to another router, the receiving router would start to behave classlessly even if 'no ip classless' was in the configuration. This behavior was not seen with eigrp, rip v1, rip v2

RE: IP Classless Revisited (More info)

2001-03-26 Thread John Neiberger
That would be a good test, actually. I think your summarization of the "feature" is right on. It's almost as if the router thinks "Well, we're running OSPF so *surely* he must not *really* want 'no ip classless' turned on. So I'll go ahead an

RE: IP Classless Revisited (More info)

2001-03-26 Thread Bob Vance
Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John Neiberger Sent: Sunday, March 25, 2001 1:32 PM To: Vincent Cc: [EMAIL PROTECTED] Subject: Re: IP Classless Revisited (More info) Metric shouldn't have anything to do with it. Whether I'm using RIP or OSPF

RE: IP Classless Revisited (this is just odd...)

2001-03-25 Thread John Neiberger
Heh heh...yes, ip classless and bgp synchronization do fit into that category quite well! I am starting to think this is an IOS feature on this router. I tried this with RIP, EIGRP, and OSPF. 'no ip classless' behaved exactly as expected when running RIP and EIGRP. It was only w

RE: IP Classless Revisited (this is just odd...)

2001-03-25 Thread Peter Van Oene
Not that its at all helpful in this situation, but ip classless, much like bgp synchronization, fall into the category of commands that simply defy understanding when presented with test criteria. One must keep in mind that these are implementations of code that sometimes are not 100

Re: IP Classless Revisited (this is just odd...)

2001-03-25 Thread Circusnuts
ll be defined. Phil - Original Message - From: "John Neiberger" <[EMAIL PROTECTED]> To: "YY" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Sunday, March 25, 2001 3:01 PM Subject: RE: IP Classless Revisited (this is just odd...) > Sure, I&#

RE: IP Classless Revisited (this is just odd...)

2001-03-25 Thread John Neiberger
I'm not sure how that helps in this case. In both scenarios, whether using RIP or OSPF, the default route is being learned dynamically by the hub router and it is installed into the routing table. The problem is that with no ip classless configured, that router should never use the de

Re: IP Classless Revisited (More info)

2001-03-25 Thread John Neiberger
Metric shouldn't have anything to do with it. Whether I'm using RIP or OSPF the default route is being added to the routing table of the hub router. The issue is that with no ip classless configured, the hub router should NOT ever pick the default route when trying to reach unknown

Re: IP Classless Revisited (More info)

2001-03-25 Thread Vincent
I guess in faovour of metric. "John Neiberger" <[EMAIL PROTECTED]> ¼¶¼g©ó¶l¥ó [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Okay, I just tried this with RIP advertising the default route and I'm even > more confused! Now, it behaves as I would expect. With

RE: IP Classless Revisited (More info)

2001-03-25 Thread John Neiberger
Okay, I just tried this with RIP advertising the default route and I'm even more confused! Now, it behaves as I would expect. With no ip classless, pings to unknown 10.x.x.x subnets are unroutable even though there is a default route in the routing table. With no ip classless, why do

RE: IP Classless Revisited (this is just odd...)

2001-03-25 Thread John Neiberger
Sure, I'll try that but I don't see why it should matter. As I understand it, ip classless affects routing table lookups only and it doesn't care how those routes were installed into the table. Although, given this behavior, my assumption might be wrong. Thanks, John > Jo

RE: IP Classless Revisited (this is just odd...)

2001-03-24 Thread YY
PROTECTED] Subject: IP Classless Revisited (this is just odd...) Ok, just when you thought it was safe to go back in the water Or should I say, just when I thought I understood the behavior of 'ip classess' and 'no ip classless' Let me summarize my lab setup. RouterA-

IP Classless Revisited (this is just odd...)

2001-03-24 Thread John Neiberger
Ok, just when you thought it was safe to go back in the water Or should I say, just when I thought I understood the behavior of 'ip classess' and 'no ip classless' Let me summarize my lab setup. RouterA-RouterB--RouterC Pretty simple. AtoB is 10.1.1.0/24,

Re: IP Classless

2000-10-30 Thread Sam LI
ation 10.1.1.1 (for example) it will match one of the above rule 10.1.0.0. now when another packet reach this router and ask for 10.4.0.1 (for example) now, since there is no rules under the 10.0.0.0 network, it will drop even there is a static route. This is the no IP classless for the ip classless, the p

Re: IP Classless

2000-10-29 Thread Frank B.
By default, when performing a look-up in the route table a router will first try to match the major network then the subnet--if there's no match and no default network route, the packet's dropped. Again this is the default behavior. With ip classless, you enable the router to f

Re: IP Classless

2000-10-29 Thread Shane Stockman
IP Classless is used for route summarization and for further subnetting a subnet for point-to-point WAN links using VLSM.It is important because by using ip classless u can perform route summarization thereby saving on bandwidth utilization,router processing and reduce the size of routing

RE: IP Classless

2000-10-29 Thread Daniel Cotts
With "no ip classless" the router looks for an exact match for a route. If not found the packet is dropped. So if the packet destination is 172.16.33.1 and 172.16.33.0 /24 is not in the table then it goes into the bit bucket. With "ip classless" if an exact match is not found

IP Classless

2000-10-29 Thread Cisco Kid
Hi, Can someone pls. give me a simple explanation of the IP Classless command and why/when it is necessary. Thanks Rashid _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to

RE: IP Classless (from Q&A Forum at Cisco)

2000-09-27 Thread Chuck Larrieu
Akiddeledivydo -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Cthulu, CCIE Candidate Sent: Wednesday, September 27, 2000 7:09 AM To: [EMAIL PROTECTED] Subject:IP Classless (from Q&A Forum at Cisco) I got this off teh Q&A fo

IP Classless (from Q&A Forum at Cisco)

2000-09-27 Thread Cthulu, CCIE Candidate
I got this off teh Q&A forum, and thought the group would enjoy reading it... Question: What is the function of command ip classless in such a network OSPF is used as the routing protocol. Would it be possible to explain it by giving an example? Answer: The ip classless command makes

RE: ip classless, Not exactly correct

2000-09-26 Thread Tom Pruneau
able. > >Jason > Without the IP classless command a router sees routes as classful So lets say you on your router you have a serial interface with the address 10.0.0.1 /30 and an ethernet with the address 220.110.60.1 and a default route pointing out the serial interface Without the ip classles

RE: ip classless

2000-09-24 Thread Yee, Jason
:[EMAIL PROTECTED]]On Behalf Of Hubert Pun Sent: Friday, September 22, 2000 4:55 AM To: Cisco Study Group Subject: ip classless What does this command do? thanks in advance **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html

Re: ip classless

2000-09-21 Thread Francisco Muniz
(as defined by its class) and then looks for the right subnet within that network, apparently (according to the answer I'm getting) if it doesn't find the subnet within the net, it drops the packet. That said, the commands "ip classless" and "no ip classless" are us

ip classless

2000-09-21 Thread Hubert Pun
What does this command do? thanks in advance **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 subs

RE: ip classless ?

2000-08-27 Thread Erick B.
Let me explain the difference. The best description of it I've seen documented is in the networkers 2000 or 1999 Intro to routing presentation I believe. I can't locate it at the moment. Anyway, the 'ip classless' and 'no ip classless' global IP options modify the

RE: ip classless ?

2000-08-27 Thread Chuck Larrieu
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Matt Gravlin Sent: Saturday, August 26, 2000 9:49 PM To: [EMAIL PROTECTED] Subject:Re: ip classless ? The ip classless command is used when setting up default routes. Cisco routers

Re: ip classless ?

2000-08-27 Thread GNOME
yes "Yee, Jason" <[EMAIL PROTECTED]> wrote in message 859B90209E2FD311BE5600902751445D2E7CF4@LYNX">news:859B90209E2FD311BE5600902751445D2E7CF4@LYNX... > hi , > > Anyone knows why when we use RIP or IGRP routing protocols and we have a > default network com

Re: ip classless ?

2000-08-26 Thread Matt Gravlin
The ip classless command is used when setting up default routes. Cisco routers (classful by default) expect a subnet mask when entering your static ip route commands, so when you are setting up a default route, you must specify ip classless, since no remote subnets will be in its routing table

Re: ip classless ?

2000-08-24 Thread whatshakin
ng to think at that time of the morning. Hope you get some ZZZ's tonight! - Original Message - From: Casey Fahey <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, August 23, 2000 8:36 AM Subject: Re: ip classless ? > Wrong? Me? Golly, I had trouble

Re: ip classless ?

2000-08-23 Thread Ovate
Guy's,   "When classless routing is in effect, if a router receives packets destined for a subnet of a network that has no network default route, the router forwards the packet to the best supernet route."   Fenris

Re: ip classless ?

2000-08-23 Thread Casey Fahey
understanding as to WHY, and how it might impact our network design decisions. (Like, don't use RIP or IGRP...? :) ) Just for grins, the definition I prefer, from Jeff Doyle's book, pp765 "IP Classless : Enables classless route lookups so that the router can forward packets to unk

RE: ip classless ?

2000-08-23 Thread dacarl4
Puffers Buddy, Actually you are correct about configuring a default route, BUT you won't be able to use that default static route if you don't enable your router with IP classless (enabled by default in 11.2 and up). IP classless allows a router to use the best "sup

RE: ip classless ?

2000-08-23 Thread David Jones
Casey is right. I've setup quite a few Internet connections where no routing protocols are used and in order to route correctly when using a supernetted class A or other, you must use ip classless or you ain't goin' nowhere. Dave -Original Message- From: whatshakin

Re: ip classless ?

2000-08-23 Thread Adam Hickey
Hmmm, let's see where to start 1: EIGRP uses classless routing by default unlike IGRP. 2: Default routes refer to static routes--not dynamic routes used in RIP, EIGRP, IGRP, etc. 3: The command "ip route 0.0.0.0 0.0.0.0 w.x.y.z" enables a default route--not "ip cl

Re: ip classless ?

2000-08-23 Thread whatshakin
This is wrong amigo. The 'ip classless' command is used when configuring default routes. It is used because when you create a default route on a router it gets advertised as 0.0.0.0 in addition to the default network. When a router recieves the advertised default route it will forwa

Re: ip classless ?

2000-08-22 Thread Adam Hickey
RIP and IGRP are Classful routing protocols. Meaning that they will recognize and IP by the first octet and automatically use the default mask associated with that class. They will disregard any subnets. Therefore you have the ip classless command which tells these protocols to forget about the

RE: ip classless ?

2000-08-22 Thread Sam Adams
Turns out that ip classless is enabled by default. Perhaps that is why you need to use "no ip classless" See the www.cisco.com for details. Ip Classless - 11.3 The default behavior changed from disabled to enabled -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL

Re: ip classless ?

2000-08-22 Thread Casey Fahey
Ah yes, classful addressing. Blast from the past... I am assuming you are aware of the classes of IP addresses, and how a class A address has a first octet of 1-127, etc.. Well, what IP Classless means is that the router *does not* assume that an IP address with a first octet of 1-126 is a

ip classless ?

2000-08-22 Thread Yee, Jason
hi , Anyone knows why when we use RIP or IGRP routing protocols and we have a default network command entered , we need to include ip classless? Any form of input will be greatly appreciated thanks Jason ___ UPDATED Posting Guidelines: http

Re: ip classless

2000-08-22 Thread cv . perez
Wrong. ip classless allows a router receiving a packet it doesn't know how to forward (unrecognized subnet and no default route in the routing table) to choose the best supernet to forward it finally. Otherwise with no ip classless, the packet is discarded. cvp ccnp, ccda "

ip classless

2000-08-22 Thread Yee, Jason
hi guys, ip classless is for routing protocols to advertise subnets whereas no ip classless is for routing protocols not to advertise subnet info Am I right in saying that? thanks Jason ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html

IP classless/Default routes

2000-08-09 Thread Cohen, Michael
- From: Donald B Johnson Jr [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 08, 2000 3:02 PM To: [EMAIL PROTECTED]; Dave Page Subject: IP classless/Default routes Dave Let me clear this up a little, you can place more than one default route in the routing table but the router will only use the first

RE: IP classless/Default routes

2000-08-08 Thread Timmons, Robert
ent: Tuesday, August 08, 2000 11:28 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: IP classless/Default routes Dave, If you have a CCO login check this page out. It explains the differences between Default Gateway, Gateway of last resort, and default network. If you don't have

RE: IP classless/Default routes

2000-08-08 Thread Cohen, Michael
- From: Donald B Johnson Jr [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 08, 2000 3:02 PM To: [EMAIL PROTECTED]; Dave Page Subject: IP classless/Default routes Dave Let me clear this up a little, you can place more than one default route in the routing table but the router will only use the first

  1   2   >