IS-IS, not exchanging update

qplayed

I've got 2 routers runnning is-is but i'm not exchanging updates for some reason

here's a snippet of the config

R1
router isis
net 45.0001.xxxx.xxxx.xxxx.xxxx.00
is-is metric 25

R2
net 45.0001.xxxx.xxxx.xxxx.xxxx.00
is-type level-1


can someone explain to me why?

cisco_trooper

Make sure your net statements are unique for each of routers R1 and R2. Also make sure you have identified which interfaces on those routers are going to participate in ISIS with ip router isis


Also check out http://www.techexams.net/forums/viewtopic.php?t=30423


Best of luck. IS-IS is one of those topics that had my head in knots until I got the concepts down.

qplayed

thanks ct..

but my configs are almost similar to
http://www.cisco.com/warp/public/97/isis-frint.html
only real difference is that my net addresses start with 45.0001 instead of 49.0001
is that the problem? also both routers are connected on the same switch
and both routers have a net of 45.000.1 with unique sys-id(mac address)

i was told that the routers are not in the same area? is that correct?

there must be something i am not understanding...

cisco_trooper

It is my understanding that if you choose to use the AFI identifier that it must be one of three values: 39 (country code), 47 (international code), or 49 (private). I haven't played with 39 or 47 but 49 signifies that you can choose your own ISO addressing scheme. So in short, I suspect 45 will be a problem for you.

ISO Addressing was made to scale the globe, and it can be as complex as that suggests. Go with the simplest addressing scheme necessary to get the job done.

I chose not to use the AFI in my ISO addresses and went with something similar to

net 00.0000.0000.0001.00



the first two 00 indicate the area. The follow 12 digits are the unique address, and the last two 00 are the NET.

Good luck.

qplayed

i figured it out :P
i dug into it some more and i didn't realize i had an extra few bytes in the net address

45.0001.0010.12A3.00C1.0010.00
45.0001.0030.00B1.BD01.0120.00


45.0001.0010 != 45.0001.0030

2 totally different areas!

tsk tsk ts ...details details.....more reading !

cisco_trooper

qplayed wrote:

i figured it out :P
i dug into it some more and i didn't realize i had an extra few bytes in the net address

45.0001.0010.12A3.00C1.0010.00
45.0001.0030.00B1.BD01.0120.00


45.0001.0010 != 45.0001.0030

2 totally different areas!

tsk tsk ts ...details details.....more reading !

Just curious...is this working with the AFI of 45?

qplayed

yes sir

cisco_trooper

sweet. good to know. never tried it.

qplayed

i actually did this on accident as I was reviewing some quizzes from CNAP and making
a lab out of some questions.

miller811

What kind of devices are you testing ISIS on. I am at the point to run some labs for ISIS and it appears my gear will not run it.

dtlokee

miller811 wrote:

What kind of devices are you testing ISIS on. I am at the point to run some labs for ISIS and it appears my gear will not run it.

What gear are you using?

miller811

I have the following
3 1720 routers
1 831 router
1 2620 router
1 2610 router
1 1605 router
1 2524 router
1 3640 router

cisco_trooper

Here is what I had used for the ISIS lab and configs.

Don't know the state of the configs, but if you're interested...

http://www.ipnetworksllc.com/routerconfigs/ISIS.zip

miller811

cisco_trooper wrote:

Here is what I had used for the ISIS lab and configs.

Don't know the state of the configs, but if you're interested...

http://www.ipnetworksllc.com/routerconfigs/ISIS.zip

Are you using dynamips, or real gear for the ISIS lab?

qplayed

i'm using real gear used to use dynamips