North American Network Operators Group
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Re: Cisco 7200 series and G2 NPEs

  • From: Robert Boyle
  • Date: Mon Jul 16 01:01:37 2007

At 11:29 PM 7/15/2007, Steven Haigh wrote: 
I'm wondering if there is anyone willing to share any experiences they
have had with Cisco 7200 series equipment (specifically relating to
the G2 NPE) and any 12.4 based IOS.

We were initially advised by Cisco to run 12.4(4)-XD7, however upon
introducing our first G2 into the network, the vpdn target routers had
a ~20% CPU usage increase, while the G2 itself showed signs of
incorrectly establishing tunnels. Changing back to a G1 NPE (same
config) and everything works as expected.

It didn't seem quite right to us either.

Cisco has recommended that we move to a 12.2 SB IOS for the G2,
however I'm wondering what other people are doing.

We are running 12.2(31)SB5 and we have been very pleased. We are using MPLS, BGP, ISIS, CEF, SNMP, and TACACS+ with I/O-2FE, 3 GE fiber SFPs, PA-MC-T3s, and PA-FEs.

On another note, it seems as though it is not possible to recover a G2
from a rommon state with invalid bootloader images or corrupt
bootflash:. There are no commands in the rommon to allow Xmodem
uploads via the console, nor any networking functions. I also noticed
that it seems to be impossible to load the bootloader from a CF card -
even though you can list the contents of the CF card.

Does anyone have any recovery techniques that I'm not aware about in a
real world failure scenario?

That sounds disturbing. I can't imagine they would not have a way to recover using TFTP or flash.

-Robert



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