[c-nsp] Cisco ME3600X and Bridge-Domain Routing config question

Reuben Farrelly reuben-cisco-nsp at reub.net
Mon Nov 14 05:42:02 EST 2011


On 14/11/2011 9:32 PM, Arie Vayner (avayner) wrote:
> Reuben,
>
> On the ME3600X you cannot have the same VLAN used as an SVI for Layer 3
> bridge-domain on a service-instance, and at the same time also applied
> as a regular allowed VLAN on a trunk or as the VLAN of an access port.
>
> Check that VLAN780 is not allowed anywhere on the system (trunks and
> access ports), and it is only used as "bridge-domain" on a single
> service-instance EFP.

That'll be it.  VLAN 780 is not set on any access ports or used anywhere 
else, but there are a few trunk ports on that switch and some others 
which have no restrictions on which VLANs can pass (eg switch-switch 
within the same POP and rack which are "trusted") such as:

interface GigabitEthernet0/23
  description NETWORK - Link to sw2.qld Gi0/23
  port-type nni
  switchport mode trunk
  mtu 1546
  storm-control broadcast level 2.50 1.50
  storm-control action trap
end

Hrm, it's going to be fun to retrospectively restrict trunk ports on 
both ends all through the network to get around this.  Maybe EVC's just 
isn't going to work for me afterall.

Thanks for the help Arie.  Much appreciated.

Reuben



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