If it helps, I think Cisco has fixed the VLAN interface issue in the 35xx
series switches, you can graph SNMP stats from your VLANS directly. You
even have an interface for VLANs from the CLI.
Deepak Jain
AiNET
On Thu, 28 Oct 1999, Kai Schlichting wrote:
> At 01:16 PM 10/28/99 -0400, Tatsuya Kawasaki wrote:
> >I was told that secondray ip address command is not recommend for
> >perm. network.
> >Does anyone have used command for perm. network and experiencing some
> >problem?
> >
> >Tatsuya
>
> yes. I had an issue with 11.1.17CC on a 7204 with FastEther (single),
> connected to a BayStack350T switch with several configured VLANs.
> I served the different VLANs from a switch port that was member of
> all VLANs (in Cisco-speak: trunk port, except that the Bay doesn't
> require trunking), with the FastEtherX/0 port having secondary
> IP's for every VLAN.
>
> In some instances my inter-VLAN traffic going through the router would
> mysteriously drop to a measly <500Kbps (!), despite the router not
> breaking into sweat (cpu load: 2-4%). This also happened with
> some traffic coming out of a VLAN and hitting another (SerialX/X)
> interface on that 7204 - e.g.: not being re-sent out of the FastEther.
>
> I was too busy with upgrades and running a production network to play
> with this - the problem went away since I replaced the BaySwitch (f'ing
> unreliable pieces of sh*t ! One doesn't do IP MC right, the next one
> craps out if you load it with >20Mbps, the last one forgot it's management
> IP address every 24 hours!) with a 2926 (ok, that's quadruple price
> per port unfortunately, but at least its known to work), and do full
> VLAN trunking with ISL and FastEther subinterfaces. Everything's fine
> since then.
>
> Now someone tell me: why oh why did Cisco , in their infinite wisdom,
> chose to not show FastEthernet (ISL) subinterfaces as full interfaces
> via SNMP, as opposed to say: Frame Relay sub-interfaces ? I now
> have to add up and count VLAN traffic across the 2926 switch. Argh.
>
> Note that I consulted a CCIE friend of mine about this problem, and he
> was rather concerned. Didn't seem to be a regular occurrence, so this
> might work in your favor.
>
> bye,Kai
>
>
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