[c-nsp] Interworking on 6500s

[David Freedman]

I believe that layer 2 local switching is not supported on LAN cards
such as yours on your platform,


Can I just ask why you would want to do such a thing ?

Connecting two ports can be achieved by bridging them together (vlan),
you can preserve 802.1q tags with dot1qtunnelling and allow many BPDUs
to pass transparently without the device intervening using
l2protocoltunnel (l2pt)

If you wish to interwork from tagged to untagged, you could use use the
"native" vlan on a bridged pair (as above) to achieve this.

Dave.



Chris Phillips wrote:
> Looking at interworking on 6500s with SUP720-3BXLs running SXI on
> non-PA, non-OSM and non-SIP/SPA cards.  The command takes going Ethernet
> to Ethernet.
> 
> connect TEST1 FastEthernet 9/25 FastEthernet 9/26
> 
> sh connect
> 
> ID   Name            Segment 1              Segment 2 State
> ================================================================================
> 
> 6    TEST1           Fa9/25                 Fa9/26 ADMIN UP
> 
> or...
> 
> connect TEST2 FastEthernet 9/26 GigabitEthernet 7/16.4080 interworking
> ethernet
> 
> sh connect
> 
> ID   Name            Segment 1              Segment 2 State
> ================================================================================
> 
> 5    TEST2           Fa9/26                 Gi7/16.4080 ADMIN UP
> 
> However, traffic does not seem to want to pass.
> 
> Looked over a few documents online.  They seem to suggest that
> interworking is only supported on SIP/SPA, OSM and PA cards.
> 
> #######
> Cisco 7600 and 6500 Series Router Restrictions
> 
> •Layer 2 Local Switching supports the following port adapters and
> interface processors on the Cisco 7600-SUP720/MSFC3 router:
> 
> –All port adapters on the Enhanced FlexWAN module
> 
> –All SPAs on the SIP-200 line cards
> 
> •On the Cisco 6500 series and 7600 series routers, only like-to-like
> local switching is supported (ATM to ATM and Frame Relay to Frame Relay).
> 
> •Same-port switching is not supported on the Cisco 6500 series and 7600
> series routers.
> #######
> 
> Has anyone have any experience to the contrary?
>