2 X 8600 & IST

[mucka]

Hello all , hope you had a good christmas !
bit of advice please , we have two passports connected thro IST on seperate vlan & no OSPF .
Would I be correct in having their respective default V1 addresses on the same subnet ?
ie: 10.254.254.2 passport A and 10.254.254.3 pasport B./24 mask.
This way when we implement vrrp with SMLT we can have a virtual management ip of 10.254.254.1 ??
Also these vlans would have ospf enabled and in the same area id ??
This is how we have it on test although not yet in service.
I am a little confused as passport B although only connected via IST can see all the routes as in Passport A.The interface for these routes is "default" so they obviously get the routes thro V1.
Any help much appreciated

Thanks
Mucka

 

[JeroeNortel]

Hi mucka,

Hope you had great time to!

Back on the ist question i suggest your ist should be in it's own separate vlan. Like your example should work correctly, only i'm not sure about the vrrp address. I think this should work without problems but I cannot tell for sure since i never tested this (we use a different vrrp address on the ist).
Regarding to the specified ospf area it is no problem to set the ist vlan into the same ospf area as other vlan's. We have about 75 vlan's active (including IST) in the same ospf area.
About the confusion; whenever an ist is active between 2 passport, both devices will share their routing table since they act as 1 router. This why you can see routes normally known on Passport A also on Passport B and viceversa because of the sharing technology (IST).

Goodluck with configuring and testing this setup!

 

[ISISMGT]

Hi,

I have
we have two 8610 connected by IST.
The two 8610 have an MTU=1950 on all interfaces.

We connect stack of 470-48T by MLT on this core : 2 link activate by stack.

The MTU on the 470 stack is set to 1514 for all interfaces.

We directly connect an OSA card (OS390 IBM) in Fast Ethernet on the 8610.

The MTU on OSA is set to 576 (may be 1492 => I've not yet the information).

We have problems with this configuration : many traffic on the OSA Card and lot of ping are lost (*) when we try to ping the OSA card.

Or the response don't arrive in the time slot selected (option -w of ping, -w was used with 7500 => 7,5 s).

Thus, we have connected the OSA card on the stack and it works well.

On this Forum, there was a previous thread (thread902-1077941 posted by AyrishGrl, problem betwenn Cisco and switch nortel 86xx) but I have not see the result of modify the MTU value on the 86xx side.

Can somebody explain me what is happening and the exact rule to hace a correct MTU between all the LAN (cisco router with FE 100 Mbps, 2 x 8610 and stack of 470-48T) ?

Thank You for your help.

Best Regards.

ISISMGT

 

[ISISMGT]

Some other informations :

Software release on the 8610 : 3.7.3

One vlan => default vlan ID=1

ISISMGT