[nsp] 7400 IOS

Temkin, David temkin at sig.com
Wed Aug 20 19:01:13 EDT 2003

We ran into
product=IOS&fset=&swver=12.3&keyw=PXF&target=2&train=T today on two test
7401's.  With two boxes back-to-back with 100mb between them and 100mb to
two workstations, running ttcp with PXF yielded 91Mbits, what we'd expect to
see.  With PXF on, we saw 40Mbits.

This bug appears to be in *all* versions of IOS for the 7401

For those without CCO:
Release Notes
Symptoms: Packet loss may occur on a Cisco 7401.

Conditions: This symptom is observed on a Cisco 7401 that is running Cisco 
12.2 B and that has Parallel Express Forwarding (PXF) enabled.

Workaround: Disable PXF.

-----Original Message-----
From: Darren Smith [mailto:data at barrysworld.com] 
Sent: Wednesday, August 20, 2003 5:22 PM
To: Chris Roberts; Cisco NSP
Subject: Re: [nsp] 7400 IOS

Hi Chris

We now have about half a dozen 7400 routers and use BGP/DOT1Q/NETFLOW mainly
and they've been working fine with 12.2(14)S3.....

Having said that, I have had a some really odd things happening recently on
one or two of them.

Two of my routers hung for no apparent reason at different times this week.

Console access worked and I could 'show proc cpu' to show 0% cpu usage, if i
did a 'show int' i see all my interfaces are up, but no packets flow.

Our DSL L2TP terminator is running 12.2(16)B1 at the minute and has been up
for just over 5 weeks.

Last word of warning, I tried 12.3 and it they just locked up big style
after about 2 hours, no console access or anything.

I have no TAC access at the minute so unfortunately cannot raise the hanging


Darren Smith

PS. Netflow v5 seems to be working properly at last in the later builds as
well :-)

----- Original Message ----- 
From: "Chris Roberts" <croberts at bongle.co.uk>
To: "Cisco NSP" <cisco-nsp at puck.nether.net>
Sent: Tuesday, August 19, 2003 10:09 AM
Subject: [nsp] 7400 IOS

> Heya,
> I'm looking for experiences with 7400 IOS', for a 7401ASR I have. I've 
> heard lots of reports of problems with these routers, especially 
> related to PXF, and some people saying they have had more luck turning 
> PXF off.
> I'm looking mainly for PPPoA and QoS features.
> Cheers,
> Chris.
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