[c-nsp] portchannel & dcef?

[Rodney Dunn]

On Tue, Nov 30, 2004 at 07:01:49PM -0500, Jon Lewis wrote:
> Which counters should I believe here?

My lab setup doesn't have dual FE's for me to configure
the port-channel at the moment.  I do seem to recall
looking at this before and concluding that unlike
MLPPP on the 75xx with a PC you could have members
on different VIPs and still dCEF switch packets to/from
it.

Can you clear the counters and wait 20 seconds and
get a "sh int stat" again?
Depending on what interfaces are feeding the
port channel look at 'sh int stat' for those
also.

One other idea I had was you could put netflow on
the interface and see if the flows show up on
the RSP via "sh ip cache flow".  If they do you know
they are being handled by the RSP.  Otherwise you
have to get on the vip and look at the flows in the
cache.

As for a code suggestion with the features you mentioned
that gets a bit more difficult.  Are you interested
in MPLS HA? 
Are you putting the PC subinterfaces in a VRF or
are you doing MPLS over the PC? 

Rodney
 


> Port-channel1 is up, line protocol is up
>     No. of active members in this channel: 2
>         Member 0 : FastEthernet0/1/0 , Full-duplex, 100Mb/s
>         Member 1 : FastEthernet9/1/0 , Full-duplex, 100Mb/s
> 
> Port-channel1
>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                Processor     133148   14128646     111848   30775214
>              Route cache   46955381 29071674419   25787614 7496727114
>        Distributed cache   39551898 24332774898   61849140 24804788966
>                    Total   86640427 53418577963   87748602 32332291294
> 
> FastEthernet0/1/0
>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                Processor   16843817 14269164688      70705    5591707
>              Route cache          0          0   12332826 3358534594
>        Distributed cache   11565829 7531136759   30315122 12049112043
>                    Total   28409646 21800301447   42718653 15413238344
> 
> FastEthernet9/1/0
>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>                Processor   30540521 15041692873      42972    9987198
>              Route cache          0          0   13454541 4138158849
>        Distributed cache   28347828 17028573669   32096251 12994907648
>                    Total   58888349 32070266542   45593764 17143053695
> 
> Are the packets really being processor switched by the RSP, or are they
> being distributed switched by the VIPs?  If the former, is there anything
> I can do about it?  This is on a 7500 (RSP4, VIP2/50s, 12.2S code).
> 
> Also, we've been playing a bit of IOS roulette recently due to what
> appears to be dCEF issues making certain IPs on our network reachable/or
> not from other IPs on our network.  We're currently running
> rsp-k91pv-mz.122-18.S5.bin.  We've also recently run
> rsp-k91pv-mz.122-18.S2.bin and rsp-pv-mz.122-14.S1.bin.
> 
> What I need is stability with the following features:
> IP
> OSPF
> BGP
> Etherchannel
> .1q subinterfaces (on the portchannel)
> MPLSVPN (and tag switching, TDP, vrfs, etc.)
> dCEF that works.
> 
> ----------------------------------------------------------------------
>  Jon Lewis                   |  I route
>  Senior Network Engineer     |  therefore you are
>  Atlantic Net                |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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