From: Khurram Khani (kkhani@xxxxxxxxxxxxxxxxxx)
Date: Tue Jun 04 2002 - 20:56:34 GMT-3
Hi Kris,
Thanks for your time. I understand that bridge mac is changing for each STP
instance.
Going back to original question, in which table or place Cat is storing
these MACs ,
any instruction to see or "predict" all Bridge MACs before initializing the
STP instance
itself??
> a show cam will show you all mac addresses or the internal arp addresses
If you do show cam system, show cam static, show cam permanent, I can't see
the STP Bridge MAC listed there.
What is Internal ARP Address? I have a pure L2 Switch.
Thanks
Khurram.
----- Original Message -----
From: <kris.keen@aon.com.au>
To: "Khani, Khurram [INGO1:8851:EXCH]" <kkhani@americasm06.nt.com>
Sent: Tuesday, June 04, 2002 4:26 PM
Subject: Re: STP Bridge MAC , how Catalyst is Selecting??
>
> Khurram,
>
> Go and read the Lan Switching book by Cisco Press.
> Sounds like you have per vlan STP running, and so the mac's will change.
>
> a show cam will show you all mac addresses or the internal arp addresses
>
> Cheers
>
> -----------------------------------------------------------------
> Kris Keen - CCDA, CCNP, CNE
> Network Support Specialist - Network Systems
> Aon Risk Services Australia Limited
> (612) 9253 7272
> 0404862970
> E: Kris.Keen@aon.com.au
>
>
>
>
>
> "Khurram Khani"
> <kkhani@nortelnet To:
<ccielab@groupstudy.com>
> works.com> cc:
> Sent by: bcc:
> nobody@groupstudy Subject: STP Bridge MAC ,
how Catalyst is Selecting??
> .com
>
>
> 05/06/2002 08:45
> AM
> Please respond to
> "Khurram Khani"
>
>
>
>
>
>
> Hi ,
>
> I can see Catalyst is selecting a different Bridge Mac Address for each
> Spantree Instance I am running.
> This bridge mac is different then any Ethernet Port macs.
>
> My ethernet port macs are in series: 00:30:7b:33:22:xx
> Bridge Macs are in series: 00-10-1f-94-c0-xx
>
> Is there an instruction to list all internally stores macs in Catalyst?
>
> Thanks
> Khurram.
>
>
>
> onsole> (enable) show spantree
> VLAN 1
> Spanning tree enabled
> Spanning tree type ieee
>
> Designated Root 00-10-1f-94-c0-00
> Designated Root Priority 32768
> Designated Root Cost 0
> Designated Root Port 1/0
> Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
>
> Bridge ID MAC ADDR 00-10-1f-94-c0-00 <================== this
> address !!!!
> Bridge ID Priority 32768
> Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
>
> Port Vlan Port-State Cost Priority Fast-Start Group-Method
> --------- ---- ------------- ----- -------- ---------- ------------
> 2/1 1 not-connected 19 32 disabled
> 2/2 1 forwarding 19 32 disabled
> 2/3 1 not-connected 100 32 disabled
> 2/4 1 not-connected 100 32 disabled
> 2/21 1 not-connected 100 32 disabled
> 2/22 1 not-connected 100 32 disabled
> 2/23 1 not-connected 100 32 disabled
> 2/24 1 not-connected 100 32 disabled
> 3/1 1 not-connected 100 32 disabled
> 3/2 1 not-connected 100 32 disabled
> 3/3 1 not-connected 100 32 disabled
> 3/4 1 not-connected 100 32 disabled
> 3/5 1 not-connected 100 32 disabled
> 3/6 1 not-connected 100 32 disabled
> 3/7 1 not-connected 100 32 disabled
> 3/8 1 not-connected 100 32 disabled
> 3/9 1 not-connected 100 32 disabled
> 3/10 1 not-connected 100 32 disabled
> 3/11 1 not-connected 100 32 disabled
> 3/12 1 not-connected 100 32 disabled
> 5/1 1 not-connected 4 32 disabled
> 5/3 1 not-connected 4 32 disabled
> 5/4 1 not-connected 4 32 disabled
> 5/5 1 not-connected 4 32 disabled
> 5/6 1 not-connected 4 32 disabled
> 5/7 1 not-connected 4 32 disabled
> 5/8 1 not-connected 4 32 disabled
> 5/9 1 not-connected 4 32 disabled
> Console> (enable) q
>
>
> Console> (enable) show spantree 3
> VLAN 3
> Spanning tree enabled
> Spanning tree type ieee
>
> Designated Root 00-10-1f-94-c0-02
> Designated Root Priority 32768
> Designated Root Cost 0
> Designated Root Port 1/0
> Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
>
> Bridge ID MAC ADDR 00-10-1f-94-c0-02 <=========== this address
> !!!!!
> Bridge ID Priority 32768
> Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
>
> Port Vlan Port-State Cost Priority Fast-Start Group-Method
> --------- ---- ------------- ----- -------- ---------- ------------
> 2/5 3 forwarding 19 32 disabled
> 2/6 3 not-connected 100 32 disabled
> 2/7 3 not-connected 100 32 disabled
> 2/8 3 not-connected 100 32 disabled
> Console> (enable)
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