From: Nigel Taylor (nigel_taylor@xxxxxxxxxxx)
Date: Wed Sep 12 2001 - 03:25:06 GMT-3
pete,
As we're on the topic of ISIS, I was working through an exercise that
involved ISIS being implemted over an ISL trunk in which case part of the
exercise called for the connection to be routed over a bridged interface.
In my testing the connection shows up as a ES-IS type and would not form a
full adjacency.
Any thoughts..
TIA
Nigel
>From: "Peter Van Oene" <pvo@usermail.com>
>Reply-To: "Peter Van Oene" <pvo@usermail.com>
>To: ccielab@groupstudy.com
>Subject: RE: ISIS over Ethernet
>Date: Tue, 11 Sep 2001 08:58:58 -0400
>
>This is a common misconception. ISIS does not use CLNS(CLNP) for
>transport. ISIS uses a direct layer two encapsulation. No idea on the
>multicast drops though :)
>
>
>*********** REPLY SEPARATOR ***********
>
>On 9/7/2001 at 7:32 AM perkinsr@WellsFargo.COM wrote:
>
> >Jason nailed it. I put a crossover cable between R5 and R6 and the
> >adjacency formed. I don't know what the switch is doing to stop the
> >multicasts. I setup eigrp and ospf using that switch which also use
> >multicasts and those work fine. Those are IP to Ethernet multicasts
>while
> >ISIS uses CLNS to Ethernet multicasts, I don't know if that makes a
> >difference.
> >
> >Ray
> >
> >
> >
> >-----Original Message-----
> >From: rsevier [mailto:rsevier@zealousolutions.com]
> >Sent: Thursday, September 06, 2001 8:31 PM
> >To: perkinsr@WellsFargo.COM
> >Subject: RE: ISIS over Ethernet
> >
> >
> >post some deb isis adj and let's see if we can find anything there.
> >
> >Raymond
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >perkinsr@WellsFargo.COM
> >Sent: Thursday, September 06, 2001 3:33 PM
> >To: ccielab@groupstudy.com
> >Subject: ISIS over Ethernet
> >
> >
> >I can't get ISIS adjacencies to form over ethernet. Connectivity and
> >config
> >are at the end. I have tried several different NET addresses from with
>the
> >doccd or the Doyle book. All three routers will form ajacencies over
> >serial
> >and R4 has a token interface it will form an adjacency over. If I give
>the
> >CLNS Enable command on the ether interfaces they will form an ES-IS
> >adjacency. When doing debug ISIS adj-events every router says it is
> >transmitting L1 and L2 IIH packets, but no of the routers see any hellos
> >coming in. The interfaces are up/up, ping and cdp are working over these
> >links.
> >
> >The problem boils down to all router say they are transmitting hellos but
> >no
> >of the routers say they are recieving hellos.
> >
> >
> >
> >
> >3620(R4)-----2924-----3620(R6)
> > |
> > |
> > |
> > |
> > 2514(R5)
> >
> >and the essential config info is:
> >R4:
> >clns routing
> >
> >interface Ethernet0/0
> > ip address 40.40.40.4 255.255.255.0
> > ip router isis
> >
> >router isis
> > net 01.0000.0004.0004.00
> >
> >R5:
> >clns routing
> >
> > interface Ethernet0
> > ip address 40.40.40.5 255.255.255.0
> > ip router isis
> >
> >router isis
> > net 01.0000.0005.0005.00
> >
> >R6:
> >clns routing
> >
> >interface Ethernet0/0
> > ip address 40.40.40.6 255.255.255.0
> > ip router isis
> >
> >router isis
> > net 01.0000.0006.0006.00
> >**Please read:http://www.groupstudy.com/list/posting.html
> >**Please read:http://www.groupstudy.com/list/posting.html
>**Please read:http://www.groupstudy.com/list/posting.html
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