Hi, On Thu, Apr 10, 2008 at 12:11:22PM -0500, Murphy, William wrote: > interface GigabitEthernet5/1 > > switchport > switchport trunk encapsulation dot1q > switchport trunk allowed vlan 300,500,3000 > switchport mode trunk > no ip address > end
Make sure that you have jumbo MTUs configured on all physical interfaces,
because otherwise...
> interface Vlan3000
> description L3_P1_TO_PE1
> ip address 10.0.0.2 255.255.255.252
> tag-switching mtu 1508
... this command will be accepted, but Gi5/1 will drop packets >1500
on transit.
I actually prefer "ip mtu 1508" (or even "1530") to "tag-switching mtu",
because that way I can test with "ping 10.0.0.1 size 1530 df-bit" that
it's *really* working.
gert
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