From: boby2kusa (boby2kusa@hotmail.com)
Date: Mon Mar 24 2003 - 15:28:18 GMT-3
This maybe the problem:
# The mac-address interface configuration command does not properly assign
a MAC address to an interface. This command is not supported on Catalyst
3550 switches. (CSCds11328)
This is form the cat3550 release notes:
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/ol366401.
htm
The 3550 will use the same BIA for the physical interface will use the
system mac address + 1. For example, the inter fa 0/1 in your output shows
that the BIA is 000a.8a60.c480. So, the fa0/2 will have a BIA of
000a.8a60.c481 and so on. If you do a show version you probably see the
system mac address as 000a.8a60.c479.
----- Original Message -----
From: "atul pawar" <atulpawar@hotmail.com>
To: <ccielab@groupstudy.com>
Cc: <atulpawar@hotmail.com>
Sent: Monday, March 24, 2003 8:19 AM
Subject: cisco 35550 question
> Guyes
> I m having problem troubleshooting one 3550 problem. The config is as
> follows. when i checked each interface it shows same BIA Mac address for
all
> ports . Is this correct ? I can see MAc address table which has got number
> of addresses which I think should be used. for inetrafces
>
>
> SH interfaces fast0/1
> astEthernet0/1 is up, line protocol is up
> Hardware is Fast Ethernet, address is 0000.0000.0001 (bia 000a.8a60.c480)
>
>
>
> show interfaces fastEthernet 0/2
> FastEthernet0/2 is up, line protocol is up
> Hardware is Fast Ethernet, address is 0000.0000.0002 (bia 000a.8a60.c480)
>
>
>
> AMMA_3550#sh run
> Building configuration...
>
> Current configuration : 5899 bytes
> !
> version 12.1
> no service pad
> service timestamps debug uptime
> service timestamps log uptime
> service password-encryption
> !
> hostname GAMMA_3550
> !
> no logging buffered
> no logging console
> enable secret 5 $1$tZyS$rPteFklSVbFUnSa9tWnRg1
> !
> ip subnet-zero
> ip routing
> no ip domain-lookup
> !
> vtp mode transparent
> !
> vlan 2
> name Management_Vlan
> !
> spanning-tree extend system-id
> !
> !
> !
> interface FastEthernet0/1
> description ***Bickerdike Court***
> mac-address 0000.0000.0001
> no switchport
> ip address 10.10.4.1 255.255.255.0 secondary
> ip address 195.134.26.62 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/2
> description ***Platt Court***
> mac-address 0000.0000.0002
> no switchport
> ip address 10.10.6.1 255.255.255.0 secondary
> ip address 195.134.26.94 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/3
> description ***Abbey Court***
> mac-address 0000.0000.0003
> no switchport
> ip address 10.10.5.1 255.255.255.0 secondary
> ip address 195.134.26.78 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/4
> description ***Frank Cowan Court***
> mac-address 0000.0000.0004
> no switchport
> ip address 10.10.11.1 255.255.255.0 secondary
> ip address 195.134.26.174 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/5
> description ***St Georges Building***
> mac-address 0000.0000.0005
> no switchport
> ip address 10.10.1.1 255.255.255.0 secondary
> ip address 195.134.26.14 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/6
> description ***Royce Court***
> mac-address 0000.0000.0006
> no switchport
> ip address 10.10.2.1 255.255.255.0 secondary
> ip address 195.134.26.30 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/7
> description ***Duffield Court***
> mac-address 0000.0000.0007
> no switchport
> ip address 10.10.3.1 255.255.255.0 secondary
> ip address 195.134.26.46 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/8
> description ***Bradford Court***
> mac-address 0000.0000.0008
> no switchport
> ip address 10.10.7.1 255.255.255.0 secondary
> ip address 195.134.26.110 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/9
> description ***Lancaster Court***
> mac-address 0000.0000.0009
> no switchport
> ip address 10.10.8.1 255.255.255.0 secondary
> ip address 195.134.26.126 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/10
> description ***Kingsbridge Court***
> mac-address 0000.0000.0010
> no switchport
> ip address 10.10.9.1 255.255.255.0 secondary
> ip address 195.134.26.142 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/11
> description ***Sandyhill Court***
> mac-address 0000.0000.0011
> no switchport
> ip address 10.10.10.1 255.255.255.0 secondary
> ip address 195.134.26.158 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/12
> description ***Nelson Court***
> mac-address 0000.0000.0012
> no switchport
> ip address 10.10.12.1 255.255.255.0 secondary
> ip address 195.134.26.190 255.255.255.240
> duplex full
> speed 100
> no cdp enable
> !
> interface FastEthernet0/13
> description ***BSDU_TEST***
> no switchport
> ip address 10.10.13.1 255.255.255.0 secondary
> ip address 195.134.26.206 255.255.255.240
> duplex full
> speed 100
> no cdp enable
>
>
> When i checked a layer two device connected to this
> switch I can see same BIA adddress being learned on different ports.
Could
> someone please explain how 3550 should behave. My understnading is it
should
> use internal mac table using different mac address for each interface.
>
>
>
>
> I> sh lb fwd
>
> Bridge Forwarding Table Number of Entries: (83) Node:(SALF-4800-32-1)
>
> Mac Address State Port-list
>
> 00:00:00:00:00:01 Learned 2a1
> 00:00:00:00:00:02 Learned 2a2
> 00:00:00:00:00:03 Learned 2a3
> 00:00:00:00:00:04 Learned 2a4
> 00:00:00:00:00:05 Learned 2a5
> 00:00:00:00:00:06 Learned 2a6
> 00:00:00:00:00:07 Learned 2a7
> 00:00:00:00:00:08 Learned 2a8
> 00:00:00:00:00:09 Learned 2a9
> 00:00:00:00:00:10 Learned 2a10
> 00:00:00:00:00:11 Learned 2a11
> 00:00:00:00:00:12 Learned 2a12
> 00:00:39:bf:32:f4 Learned 1b1.2
> 00:0a:8a:60:c4:80 Learned 2a5 --------------------- This MAC
address
> is the 3550 BIA
> 00:10:6a:00:20:29 Learned 1b1.2
>
>
> I> sh lb fwd
>
> Bridge Forwarding Table Number of Entries: (83) Node:(SALF-4800-32-1
>
> Mac Address State Port-list
>
> 00:00:00:00:00:01 Learned 2a1
> 00:00:00:00:00:02 Learned 2a2
> 00:00:00:00:00:03 Learned 2a3
> 00:00:00:00:00:04 Learned 2a4
> 00:00:00:00:00:05 Learned 2a5
> 00:00:00:00:00:06 Learned 2a6
> 00:00:00:00:00:07 Learned 2a7
> 00:00:00:00:00:08 Learned 2a8
> 00:00:00:00:00:09 Learned 2a9
> 00:00:00:00:00:10 Learned 2a10
> 00:00:00:00:00:11 Learned 2a11
> 00:00:00:00:00:12 Learned 2a12
> 00:00:39:bf:32:f4 Learned 1b1.2
> 00:0a:8a:60:c4:80 Learned 2a2 -------------------- Same MAC
Address
> on Different interface
> 00:10:6a:00:20:29 Learned 1b1.2
>
>
>
>
>
>
>
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