[c-nsp] PPP Mulitilink on 3620

[Josh Duffek]

Does kinda sound like you are pushing too much through it...not sure
though.  Look at the "sh proc cpu" and also look at the IP INPUT
process.  Might also look at "sh int | i packets/sec" and see where that
is...found this post:

https://puck.nether.net/pipermail/cisco-nsp/2004-November/014214.html

"3620 can do 2,000pps process switched and 20,000-40,000 in CEF
depending
on the alignment of the stars."

Thanks,

josh duffek    network engineer
consultantjd16 at ridemetro.org

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of David Simmons - EliteUKServe.Net
> Sent: Tuesday, February 22, 2005 9:44 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] PPP Mulitilink on 3620
> 
> Hi,
> 
> We have a link for a service provider and they insisted on shoving in
a
> fibre
> to our building then splitting the fibre into 4 x 2mb tribs. Then from
> there
> we have 4 x X25 into a 3620 with a NM-4T. Now our other providers give
us
> LES
> circuits etc.. We run BGP.
> 
> It has all worked fine untill the traffic started rising to say nearly
4MB
> on
> this line. Then the CPU usage goes bananas on this router. Packets
start
> being lost and we get very high ping times. All this router does is
the
> PPP
> multilink and is then directly connect to a 7200 ... which handles the
BGP
> etc.
> 
> My question is ... and I will admit to not being extremely cisco
> knowledgable
> (this was dumped on my desk) ... is is this simply a matter of the
router
> not
> being able to handle whats chucked at it ... or could there be things
we
> are
> doing or not doing right with the multilink?
> 
> Hoping you may have some ideas.
> 
> Regards,
> 
> David SImmons
> 
> interface Multilink1
>  description ### Multilink (4 Serials) ###
>  bandwidth 8192
>  ip address xx.xx.xx.xx 255.255.255.252
>  ip access-group 151 in
>  ip access-group 101 out
>  ppp multilink
>  multilink-group 1
> 
> [cut]
> 
> interface Serial1/0
>  description ### Trib 1 ###
>  bandwidth 2048
>  no ip address
>  no ip proxy-arp
>  encapsulation ppp
>  no ip mroute-cache
>  serial restart-delay 0
>  ppp multilink
>  multilink-group 1
> !
> interface Serial1/1
>  description ### Trib 2 ###
>  bandwidth 2048
>  no ip address
>  no ip proxy-arp
>  encapsulation ppp
>  no ip mroute-cache
>  serial restart-delay 0
>  ppp multilink
>  multilink-group 1
> !
> interface Serial1/2
>  description ### Trib 3 ###
>  bandwidth 2048
>  no ip address
>  no ip proxy-arp
>  encapsulation ppp
>  no ip mroute-cache
>  serial restart-delay 0
>  ppp multilink
>  multilink-group 1
> !
> interface Serial1/3
>  description ### Trib 4 ###
>  bandwidth 2048
>  no ip address
>  no ip proxy-arp
>  encapsulation ppp
>  no ip mroute-cache
>  serial restart-delay 0
>  ppp multilink
>  multilink-group 1
> 
> [cut]
> 
> ip classless
> ip route 0.0.0.0 0.0.0.0 Multilink1
> ip route xx.xx.xx.0 255.255.240.0 xx.xx.xx.26
> ip route xx.xx.xx.1 255.255.255.255 xx.xx.xx.26
> 
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