From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Oct 20 2004 - 13:39:15 GMT-3
Kian,
You're right. As long as both switches are in the transit path, it doesn't
matter which switch is configured with the vlan map. This is what I thought
but I wanted to confirm this thinking and Brian M. did confirm this.
Tim
----- Original Message -----
From: "Kian Wah, Lai" <kian_wah@qala.com.sg>
To: "'ccie2be'" <ccie2be@nyc.rr.com>; "'Group Study'"
<ccielab@groupstudy.com>
Sent: Wednesday, October 20, 2004 10:52 AM
Subject: RE: 3550 vlan maps
> Since VLAN maps have no direction (so they're applied to incoming and
> outgoing), I'm quite sure they can be applied to both switches.
>
> What does the rest think?
>
> You can try it out and see if it works since you have rack time now :)
>
> Regards,
> Kian Wah
> Singapore Cisco User Group
> http://www.sgcug.org
> 3 routers + one PIX rental at SGD2/hr or USD1.30/hr
> http://rack.sgcug.org
> Good for testing or practicing.
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> ccie2be
> Sent: Wednesday, October 20, 2004 10:07 PM
> To: Group Study
> Subject: 3550 vlan maps
>
> Hi guys,
>
> I think this is an interesting question.
>
> Here's the topology:
>
> / R2
> BB2 ---- sw2 --trunk--sw1
> \ R3
>
>
> BB2, R2, and R3 are all in the same vlan and all running RIP.
>
> SW1 and SW2 are trunked together; BB2 is connected to SW2 while both R2
and
> R3
> are connected to SW1.
>
> I want to prevent RIP updates from BB2 to R2 and R3.
>
> I created the following vlan map.
>
> vlan access-map BLOCK-RIP 10
> action drop
> match ip address NO-RIP-BB2
> vlan access-map BLOCK-RIP 20
> action forward
> vlan filter BLOCK-RIP vlan-list 232
>
> ip access-list extended NO-RIP-BB2
> permit udp host 192.10.3.254 eq rip any
>
> Note that 192.10.3.254 is the address of BB2.
>
> Here's the question:
>
> On which 3550 should this vlan map be configured on? Does it matter? If
> so,
> why?
>
> To me, it seems that it would be OK to have this vlan on either sw1 or
sw2,
> but I wanted to hear from anyone who disagrees or someone who can confirm
my
> thinking.
>
> Thanks, Tim
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Nov 06 2004 - 17:11:50 GMT-3