18 messages in net.nether.puck.cisco-nsp[c-nsp] Cisco 7304 as a Border router
FromSent OnAttachments
Robert BlayzorJan 14, 2005 10:30 am 
McCallum, RobertJan 14, 2005 10:39 am 
Clinton WorkJan 14, 2005 1:03 pm 
Rodney DunnJan 14, 2005 1:44 pm 
Mark PriorJan 15, 2005 12:24 am 
Majid FaridJan 15, 2005 4:59 am 
Mikael AbrahamssonJan 15, 2005 5:27 am 
sth...@nethelp.noJan 15, 2005 9:03 am 
Robert BlayzorJan 15, 2005 10:15 am 
Mark PriorJan 15, 2005 11:25 pm 
sth...@nethelp.noJan 16, 2005 12:17 am 
Majid FaridJan 16, 2005 2:23 am 
Mikael AbrahamssonJan 16, 2005 2:31 am 
McCallum, RobertJan 16, 2005 5:01 pm 
Majid FaridJan 17, 2005 12:12 pm 
Kevin GrahamJan 17, 2005 9:36 pm 
McCallum, RobertJan 18, 2005 4:59 am 
Simon LeinenJan 21, 2005 3:20 am 
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Subject:[c-nsp] Cisco 7304 as a Border routerActions...
From:Simon Leinen (sim@limmat.switch.ch)
Date:Jan 21, 2005 3:20:15 am
List:net.nether.puck.cisco-nsp

sthaug writes:

IOS choices are pretty limited and the way Cisco is handling 12.2S is confusing. At least it does jumbo frames on the GbE ports which is better than a 7206VXR/G1.

Really? We have multiple 7206VXR/NPE-G1 which handle jumbo frames on the GigE ports just fine. Both 12.0S and 12.2S.

I'd be interested to know the IOS revision for 12.2S (since I need IPv6).

Sorry, 4470 is what we use (for compatibility with SDH/SONET links), and I tend to think of this as jumbo frames. If you need 9000 bytes or more, I haven't found a way to do this.

We have some 720{4,6}VXR with NPE-G1 running with 9K MTUs here:

$ grep 'mtu 9' `grep -l 'VXR - a 7200 router' configs/*.switch.ch` configs/swiff2.switch.ch: mtu 9192 configs/swiff2.switch.ch: mtu 9192 configs/swiho2.switch.ch: mtu 9192 configs/swiho2.switch.ch: mtu 9192 configs/swimy2.switch.ch: mtu 9192 configs/swips2.switch.ch: mtu 9192 configs/swips2.switch.ch: mtu 9192 configs/swisg3.switch.ch: mtu 9192 configs/swiwi2.switch.ch: mtu 9192 configs/swiwi2.switch.ch: mtu 9192 configs/swiyv2.switch.ch: mtu 9192 configs/swiyv2.switch.ch: mtu 9192

The thing is that 9K MTU support is missing from some IOS versions. We run 12.3T on the 7200s (don't ask). The routers above all run 12.3(7)T, which did support 9K MTUs. But 12.3(8)T-12.3(11)T don't.

If I understand correctly they'll be back in 12.3(12)T.

So presumably the situation is similar in 12.2S. 4470 is certainly not a hardware limitation of the platform.

-- Simon.