[c-nsp] PPP Mulitilink on 3620

Thu Feb 24 04:34:28 EST 2005

Hi Rodney,

Is this right?

#sh adj detail
%CEF not running

#sh ppp multilink

Multilink1, bundle name is popl-lam-1
  Bundle up for 2d19h
  37401 lost fragments, 78878888 reordered, 0 unassigned
  34933 discarded, 2510 lost received, 49/255 load
  0x4C1C81 received sequence, 0x2FD961 sent sequence
  Member links: 4 active, 0 inactive (max not set, min not set)
    Se1/0, since 2d19h, last rcvd seq 4C1C84
    Se1/1, since 2d19h, last rcvd seq 4C1C81
    Se1/2, since 2d19h, last rcvd seq 4C1C82
    Se1/3, since 2d19h, last rcvd seq 4C1C83

#sh ppp multilink

Multilink1, bundle name is popl-lam-1
  Bundle up for 2d19h           
  37538 lost fragments, 78913055 reordered, 0 unassigned
  35071 discarded, 2510 lost received, 49/255 load
  0x4D8940 received sequence, 0x3035A1 sent sequence
  Member links: 4 active, 0 inactive (max not set, min not set)
    Se1/0, since 2d19h, last rcvd seq 4D8940
    Se1/1, since 2d19h, last rcvd seq 4D8941
    Se1/2, since 2d19h, last rcvd seq 4D8946
    Se1/3, since 2d19h, last rcvd seq 4D8943

CPU usage is a lot lower (well roughly 60-70% rather than 90-100%), but 
traceroute at times are still slow at the 3620 hop.

Kind Regards,

Dave

On Wednesday 23 February 2005 12:57, Rodney Dunn wrote:
> Check "sh adj detail" and look at the CEF adjacency
> for the MLPPP bundle.  Do you see packet counters
> going up for the adjacency?
>
> If you do then you are CEF switching packets out
> that interface matching that adjacency.
>
> 4xT1's in a MLPPP bundle is going to push the
> capability of the 3620.
>
> Check 'sh ppp multilink' and see what that looks
> like with a couple snapshots.
>
> Rodney
>
> On Tue, Feb 22, 2005 at 10:06:42PM +0000, David Simmons - EliteUKServe.Net 
wrote:
> > Hi Rodney,
> >
> > Please find sh vers:
> >
> > sh vers
> > Cisco Internetwork Operating System Software
> > IOS (tm) 3600 Software (C3620-JK9S-M), Version 12.2(23a), RELEASE
> > SOFTWARE (fc2)
> > Copyright (c) 1986-2004 by cisco Systems, Inc.
> > Compiled Tue 30-Mar-04 13:36 by kellmill
> > Image text-base: 0x60008930, data-base: 0x61594000
> >
> > ROM: System Bootstrap, Version 11.1(19)AA, EARLY DEPLOYMENT RELEASE
> > SOFTWARE (fc
> > 1)
> >
> > ntl1 uptime is 1 day, 7 hours, 53 minutes
> > System returned to ROM by reload at 14:09:30 GMT Mon Feb 21 2005
> > System restarted at 14:11:32 GMT Mon Feb 21 2005
> > System image file is "flash:c3620-jk9s-mz.122-23a.bin"
> >
> >
> > This product contains cryptographic features and is subject to United
> > States and local country laws governing import, export, transfer and
> > use. Delivery of Cisco cryptographic products does not imply
> > third-party authority to import, export, distribute or use encryption.
> > Importers, exporters, distributors and users are responsible for
> > compliance with U.S. and local country laws. By using this product you
> > agree to comply with applicable laws and regulations. If you are unable
> > to comply with U.S. and local laws, return this product immediately.
> >
> > A summary of U.S. laws governing Cisco cryptographic products may be
> > found at: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
> >
> > If you require further assistance please contact us by sending email to
> > export at cisco.com.
> >
> > cisco 3620 (R4700) processor (revision 0x81) with 53248K/4096K bytes of
> > memory.
> > Processor board ID 09260313
> > R4700 CPU at 80Mhz, Implementation 33, Rev 1.0
> > Bridging software.
> > X.25 software, Version 3.0.0.
> > SuperLAT software (copyright 1990 by Meridian Technology Corp).
> > TN3270 Emulation software.
> > 2 Ethernet/IEEE 802.3 interface(s)
> > 4 Serial network interface(s)
> > DRAM configuration is 32 bits wide with parity disabled.
> > 29K bytes of non-volatile configuration memory.
> > 16384K bytes of processor board System flash (Read/Write)
> > 20480K bytes of processor board PCMCIA Slot0 flash (Read/Write)
> >
> > Configuration register is 0x2102
> >
> > Best Regards,
> >
> > Dave
> >
> > On Tuesday 22 February 2005 18:26, Rodney Dunn wrote:
> > > What code is it?
> > >
> > > All MLPPP traffic is CEF switched in recent
> > > (within the last couple of years I think)
> > > code.
> > >
> > > Rodney
> > >
> > > On Tue, Feb 22, 2005 at 12:11:19PM -0500, Robert Blayzor wrote:
> > > > David Simmons - EliteUKServe.Net wrote:
> > > > > Thanks for this.
> > > > >
> > > > > I saw this. Can you clarify to me then what my maximum PPS for this
> > > > > router would be utilising the multilink¿ 2k?
> > > >
> > > > Change your load-interval to 30 seconds on your multilink interface.
> > > > That will give you a better view of current traffic...
> > > >
> > > > If your 5 minute is around 1500 pps, good chance that you have some
> > > > 2000+ pps spikes in there.  AFAIK all MLPPP is process switched,
> > > > which kills router CPU on smaller routers like the 3620 at the
> > > > multi-meg level.
> > > >
> > > > --
> > > > Robert Blayzor, BOFH
> > > > INOC, LLC
> > > > rblayzor\@(inoc.net|gmail.com)
> > > > PGP: http://www.inoc.net/~dev/
> > > > Key fingerprint = 1E02 DABE F989 BC03 3DF5  0E93 8D02 9D0B CB1A A7B0
> > > >
> > > > "I thought I had a great idea today, but it never really took off. In
> > > > fact, it didn't even get on the runway. I guess you could say it
> > > > exploded in the hangar." - Calvin and Hobbes
> > > > _______________________________________________
> > > > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
> > --
> >
> > David Simmons
> > Elite Limited
> >
> > EMail: david.simmons at elite.ltd.uk
> > Tel: +44 (0) 870 250 7610
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