From: Peter Van Oene (pvo@xxxxxxxxxxxx)
Date: Wed Sep 12 2001 - 13:55:27 GMT-3
Thats an interesting occurance. Did you by any chance capture the traffic duri
ng the adjacency formation? So long as the multicasts propogate, I can't see a
ny reason why ISL would create a problem.
*********** REPLY SEPARATOR ***********
On 9/12/2001 at 3:24 AM Nigel Taylor wrote:
>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..
>
>>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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