RE: dot1q and ISL trunks intermixing

From: Michael Stout (michaelgstout@hotmail.com)
Date: Mon Jul 03 2006 - 00:33:40 ART


Interesting question:
Try using a native vlan on one of the isl vlans.
if that doesn't work try this command
CAT1(config)#int gig 1/0/18
CAT1(config-if)#sw mo dot
CAT1(config-if)#sw mo dot1q-tunnel
CAT1(config-if)#

this tunnel is cool.
This is just a guess
CAT1(config)#int gig 1/0/18
CAT1(config-if)#sw tr en isl
CAT1(config-if)#sw mo dot
CAT1(config-if)#sw mo dot1q-tunnel
CAT1(config-if)#sw tr nat
CAT1(config-if)#sw tr native vla
CAT1(config-if)#sw tr native vlan 123
CAT1(config-if)#do srint gig 1/0/18
Building configuration...

Current configuration : 167 bytes
!
interface GigabitEthernet1/0/18
 switchport access vlan 123
 switchport trunk encapsulation isl
 switchport trunk native vlan 123
 switchport mode dot1q-tunnel
end

CAT1(config-if)#

  --------------------------------------------------------------------

  From: "Feras Abunamous (fabunamo)" <fabunamo@cisco.com>
  Reply-To: "Feras Abunamous (fabunamo)" <fabunamo@cisco.com>
  To: "Cisco certification" <ccielab@groupstudy.com>
  Subject: dot1q and ISL trunks intermixing
  Date: Sun, 2 Jul 2006 23:19:39 -0400
  I have isl trunk between two switches and I have a router's
  fastethernet
  interface split into sub interfaces and it is connected to one of
  switches over a dot1q trunk. Would this work? And is there any
  limitations on intermixing isl's and dot1q?

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