[c-nsp] 1 gbit/sec limit on cat6k vlan interfaces?

[Marian Durkovic]

> mac0#sh int vl300
> Vlan300 is up, line protocol is up
>    Hardware is EtherSVI, address is 000a.421f.0000 (bia 000a.421f.0000)
>    Internet address is 10.1.1.2/23
>    MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
>       reliability 255/255, txload 36/255, rxload 135/255
>    Encapsulation ARPA, loopback not set
>    Keepalive not supported
>    ARP type: ARPA, ARP Timeout 04:00:00
>    Last input 00:00:00, output 00:00:00, output hang never
>    Last clearing of "show interface" counters never
>    Input queue: 0/75/216102/187872 (size/max/drops/flushes); Total  
> output drops: 0

What you're seeing are mostly SPD flushes on the input RP queue.
These are relevant only for packets which are directed to the box itself
or packets which must be process-switched on the MSFC.

The large number of SPD flushes is typically related to BGP Scanner
activity, during which the SPD queue overflows. To prevent this, you
can disable SPD and increase input hold-queue on interfaces which are
used for BGP.


	With kind regards, 

		M.

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----   Marian Durkovic                       network  manager         ----
----                                                                  ----
----   Slovak Technical University           Tel: +421 2 524 51 301   ----
----   Computer Centre, Nam. Slobody 17      Fax: +421 2 524 94 351   ----
----   812 43 Bratislava, Slovak Republic    E-mail/sip: md at bts.sk    ----
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