From: Sachin Shenoy (sachinshenoy@hotmail.com)
Date: Thu May 13 2004 - 05:12:10 GMT-3
The switch was trying to negotiate a trunk ...
Hence both the ports were in forwarding ...
Once I forced the ports to Access Mode now they are behaving ...
Thanks Dan for pointing it out ...
Regards,
SACHIN
----- Original Message -----
From: "MMoniz" <ccie2002@tampabay.rr.com>
To: "Sachin Shenoy" <sachinshenoy@hotmail.com>; <ccielab@groupstudy.com>
Sent: Wednesday, May 12, 2004 8:17 PM
Subject: RE: Bridging <----> Spanning Tree ???
> It would appear to me that you have spanning-tree portfast enabled on the
> switch
>
> Fa0/19 Root FWD 19 128.19 P2p
> Fa0/20 Desg FWD 19 128.20 P2p
> Fa0/24 Altn BLK 19 128.24 P2p
>
>
> R5 Fas 0/24 159 R T S 2621 Fas
0/1
> R5 Fas 0/19 138 R T S 2621 Fas
0/0
> Cat-3550#
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Sachin Shenoy
> Sent: Wednesday, May 12, 2004 3:54 AM
> To: ccielab@groupstudy.com
> Subject: Bridging <----> Spanning Tree ???
>
>
> Hi Everybody,
>
> When two Ethernet ports of a Router are configured for Bridging and both
the
> ports are connected to the same switch, shouldn't one of the ports of the
> switch be in spanning-tree blocking state (Ports on the router have a
lower
> priority) ??? When I was trying a LAB, I connected the ports as shown
below
> by
> mistake, I couldn't figure out why all the ports (i.e 2 router ports and 2
> switch ports) were in forwarding state ..... Am I missing something simple
> and
> totally stupid ??
>
>
> ------------------
> | SW1 |
> -------------------
> | |
> Fa0/0 | | Fa0/1
> -------------------
> | R1 |
> --------------------
>
>
>
>
>
> bridge irb
> bridge 1 protocol ieee
> !
> !
> !
> interface FastEthernet0/0
> no ip address
> duplex auto
> speed auto
> bridge-group 1
> bridge-group 1 priority 8
> !
> !
> !
> interface FastEthernet0/1
> no ip address
> duplex auto
> speed auto
> bridge-group 1
> bridge-group 1 priority 8
> !
>
> The configuration on the switch (3550) is factory default (Int VLAN1 -->
> Shutdown, All ports on VLAN1)
>
> Regards,
> SACHIN SHENOY
>
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