From: Moffat, Ed (EMoffat@FSCI.com)
Date: Fri Jul 23 2004 - 17:13:10 GMT-3
Oops. Didn't see the bottom of your message about the address flap.
Georg hit it correctly regarding the debug ethernet-controller addr if
this is happening consistently. That will tell you what address or
addresses are moving. Also, take a look at the STP TCNs for your VLANs
to see if they are incrementing. Debug spantree events might also be
helpful. That way you can help run down the loop.
-Ed-
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Moffat, Ed
Sent: Friday, July 23, 2004 10:03 AM
To: Walker, James - Is; Cooper, David; ccielab@groupstudy.com
Subject: RE: Trunk and STP with HSRP question
This will not be a problem. The MAC/CAM table is independent per VLAN so
you will not have a problem with duplicate MAC addresses. If, for some
reason you really don't want this, you can add a group statement to each
of your HSRP configs. This will then use a different MAC address for the
HSRP group.
i.e.,
interface VLAN4
standby 4 ip 172.16.4.1
interface VLAN 5
standby 5 ip 172.16.5.1
You can create up to 256 group numbers (o-255) but the actual number
supported may depend on the platform.
The standby group numbers are also used fro MHSRP
Hope that helps.
-Ed Moffat-
CCIE #13196
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Walker, James - Is
Sent: Friday, July 23, 2004 9:31 AM
To: 'Cooper, David'; ccielab@groupstudy.com
Subject: RE: Trunk and STP with HSRP question
Do you have vlan 1 spanned everywhere on your network??????
Virtual mac addresses and HSRPs are fine.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Cooper, David
Sent: Thursday, July 22, 2004 10:03 PM
To: ccielab@groupstudy.com
Subject: Trunk and STP with HSRP question
If I am running multiple VLANS in a trunk and all have HSRP running
within the network can this cause issues? All my switches
Mac-address-table has the following
stcphx-swtctr2>en
Password:
stcphx-swtctr2#sho Mac
stcphx-swtctr2#sho Mac-address-table
Dynamic Address Count: 954
Secure Address Count: 0
Static Address (User-defined) Count: 0
System Self Address Count: 72
Total MAC addresses: 1026
Maximum MAC addresses: 8192
Non-static Address Table:
Destination Address Address Type VLAN Destination Port
------------------- ------------ ---- --------------------
0000.0c07.ac00 Dynamic 1 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 100 GigabitEthernet0/2
0000.0c07.ac00 Dynamic 131 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 132 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 133 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 140 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 144 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 200 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 231 GigabitEthernet0/2
0000.0c07.ac00 Dynamic 232 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 233 GigabitEthernet0/2
0000.0c07.ac00 Dynamic 235 GigabitEthernet0/1
0000.0c07.ac00 Dynamic 236 GigabitEthernet0/2
0000.0c07.ac00 Dynamic 237 GigabitEthernet0/1
All the switches show the same MAC address (HSRP virtual) on each VLAN.
I am receiving the following error in the logs of most of my switches..
%RTD-1-ADDR_FLAP: GigabitEthernet0/1 relearning 6 addrs per min
Any insight?
Thanks
-David
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