(I'm resending due to the trouble the list server had yesterday....)
Check out bug id# CSCdm69595
There are several others but they don't show up on CCO (Cisco keeps some
bugs private)
Essentially hw compression mungs up multicast data on 2600/3600 serial
interfaces. They say it was fixed in latter releases of 12.07 so you may
want to try one of the 12.1 images...
A few other multicast issues I've learned the hard way...
Early versions of the 2621 router will not pass multicast traffic through
the on board ethernet interfaces (Bug ID CSCdm38511 ) Only fix is a router
swap. My office looked like a warehouse for a while we were shipping so many
2621s back to Cisco
Multicast fast switching (ip mroute-cache) doesn not yet work with hardware
compression (Bug ID CSCdt82560) This has not been fixed as of 12.2x. So if
you are tring to save CPU by hardware compressing the multicast data you
lose CPU by not being able to fast switch.
I recall at least one 30 hour marathon with TAC hopping from various TAC
centers worldwide. As far as I recall the 2621 hardware issue was already
known at Cisco but the problem with hardware compression (both the munging
of data and the fast switching issue) were only discovered when a customer
(unfortunately me) tried to do it.....
Bob
> -----Original Message-----
> From: Simon Watson [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, July 26, 2001 2:36 AM
> To: [EMAIL PROTECTED]
> Subject: RE: Problems with AIM compression on 3660/2600 [7:13742]
>
>
> Hi Bob
>
> The IOS version on all the routers are 12.0(7)XK1
>
> Simon
>
>
> >From: "Bob Johnson"
> >Reply-To: "Bob Johnson"
> >To: [EMAIL PROTECTED]
> >Subject: RE: Problems with AIM compression on 3660/2600 [7:13742]
> >Date: Wed, 25 Jul 2001 13:36:30 -0400
> >
> >In my previous reply I'm refering to the (as far as I
> know..) the OSPF
> >multicast messages being mucked up...
> >
> >Bob (still trying to find the bug ID)
> >
> > > -----Original Message-----
> > > From: Bob Johnson [mailto:[EMAIL PROTECTED]]
> > > Sent: Wednesday, July 25, 2001 10:01 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: RE: Problems with AIM compression on 3660/2600 [7:13742]
> > >
> > >
> > > Most likely the hardware compression is mucking up the
> > > multicast traffic...
> > > I've had many many issues with hardware compression and
> > > multicast (got to
> > > know TAC people all across the world).. I'll try to dig up
> > > the bug ID.....
> > >
> > > What image are you using?
> > >
> > > Bob
> > >
> > >
> > > > -----Original Message-----
> > > > From: Simon Watson [mailto:[EMAIL PROTECTED]]
> > > > Sent: Wednesday, July 25, 2001 5:25 AM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: Problems with AIM compression on 3660/2600 [7:13742]
> > > >
> > > >
> > > > Hi Guys I have just installed a 3660 and 7 2600's (the 2600's
> > > > connected
> > > > to the 3660with 256k WAN links via 2 quad serial cards on
> > > 3660). ospf
> > > > configured(all routers on area 0), I have just changed the
> > > compression
> > > > from software to hardware to ultilize the AIM modules
> > > > installed in both
> > > > the 3660 & 2600's( I set up PPP Encapsulation from HDLC on
> > > > all routers,
> > > > and configured compress stac caim 0 on 2600's & compress stac
> > > > caim 0-3 on
> > > > 3660) However as soon I made the change I was receiving the
> > > OSPF error
> > > > message: SPF-4-ERRRCV: Received invalid packet: Bad
> Checksum from
> > > > 10.100.6.1, Serial0/0
> > > > Jul 25 03:27:15: %OSPF-4-ERRRCV: Received invalid packet:
> > > Bad Checksum
> > > > from 10.100.6.1, Serial0/0
> > > > Jul 25 03:27:21: %OSPF-4-ERRRCV: Received invalid packet:
> > > Bad Checksum
> > > > from 10.100.6.1, Serial0/0 This was happening on all the
> > > 2600's, OSPF
> > > > routes were being lost, on when I reverted to software
> > > compression the
> > > > problem subsided. Has anyone seen this problem before.Pls let
> > > > me know Rgrds
> > > > Simon.
> > > >
> > > > --------------------------------------------------------------
> > > > ----------
> > > >
> > > > Get your FREE download of MSN Explorer at
> http://explorer.msn.com
> _________________________________________________________________
> Get your FREE download of MSN Explorer at
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Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=13965&t=13742
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