Joff:
I've only worked with Catalyst 5x00's, but I believe the trick is the same:
append the VLAN number to the community string, thus:
<community-string>@<vlan-number>
For example: public@101. This actually IS documented somewhere, but it's
well-hidden and took me a long time to find it. Maybe they want us to buy
CWSI instead?
A couple of other things I've had to do to make this work reliably ...
(1) Before doing your MAC walk, refresh the switch MAC cache by a ping sweep
of relevant subnets.
(2) If you've got lots of large switches at a site, before doing your ping,
increase the default 5-minute cache timeout for MACs for the duration of the
CAM scan (it can take longer than 5 min. to walk through all the switches'
CAMs). You can alter that timeout with an SNMP put to the appropriate
variable (I don't remember which one).
Please let me know if this DOESN'T work on 2900XLs, as I think I'm going to
be dealing with one before too long.
-- Bill Clay
Network Solutions, Inc.
Charlotte NC
william.b.clay@acm.org
-----Original Message-----
From: owner-tkined@ibr.cs.tu-bs.de
[mailto:owner-tkined@ibr.cs.tu-bs.de]On Behalf Of Joff Thyer
Sent: Friday, August 04, 2000 3:56 PM
To: tkined
Subject: [tkined] dot1dTpFdbAddress and Cisco 2900
Hi,
I am using Scotty to walk through a Cisco 2900XL dot1dToFdbAddress
table in order to find a MAC address on a port after a "link up" trap
is received.
The switch is connected via a 802.1q VLAN trunk with multiple VLAN's
defined.
My problem is this: When the vlan of the port sending the "LINK UP"
trap is the default (Vlan 1), the MAC address nicely appears in the
dot1dTpFdbAddress table as expected.
If the vlan of the port is anything other than 1, the MAC address cannot
be found. I am using Vlan 1 for switch communications.
Should I be communicating to the switch via the same VLAN of this port
and expect different snmp results?
Is there a way to set which VLAN's bridge table gets returned to me?
---- Joff Thyer UNIX and Network Systems Programmer UNCG Dept. of Systems and Networks Greensboro, NC 27402-6170 Email: Joff_Thyer@uncg.edu-- !! This message is brought to you via the `tkined & scotty' mailing list. !! Please do not reply to this message to unsubscribe. To subscribe or !! unsubscribe, send a mail message to <tkined-request@ibr.cs.tu-bs.de>. !! See http://wwwsnmp.cs.utwente.nl/~schoenw/scotty/ for more information.
-- !! This message is brought to you via the `tkined & scotty' mailing list. !! Please do not reply to this message to unsubscribe. To subscribe or !! unsubscribe, send a mail message to <tkined-request@ibr.cs.tu-bs.de>. !! See http://wwwsnmp.cs.utwente.nl/~schoenw/scotty/ for more information.
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