From: Daniel Valle (danielfrvalle@gmail.com)
Date: Mon Mar 31 2008 - 17:53:11 ART
Hi GS,
does MultipleSTP and do1q tunnels compatible ? I made a trunk between SW1
and SW3 via SW4, and configured SW4 with do1q tunnel. All 6 interfaces
between them have the following config:
(SW4)
interface FastEthernet0/X
switchport access vlan 100
switchport mode access
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
l2protocol-tunnel point-to-point pagp
l2protocol-tunnel point-to-point lacp
l2protocol-tunnel point-to-point udld
no cdp enable
!
Sw1 is the Root and SW3 should reach SW1 via PO14 ( po from SW3 , through
dot1q-tunnel in SW4 and then reaching SW1) .No matter what I do , the PO14
in SW3 keeps in Designated port. if I make the same config beween the direct
links between SW1 and SW3 they work fine,
Rack3SW3#show spanning-tree mst 2
##### MST2 vlans mapped: 2-100
Bridge address 0019.aab4.fe00 priority 32770 (32768 sysid 2)
Root address 0019.aa6f.4f00 priority 24578 (24576 sysid 2)
port Po23 cost 68660 rem hops 18
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Po14 Desg FWD 1 128.176 P2p
Po23 Root FWD 66660 128.248 P2p
!
this is the config for SW1 and SW3
SW3
!
interface Port-channel14
switchport trunk encapsulation isl
switchport mode trunk
spanning-tree mst 1 cost 1
spanning-tree mst 2 cost 1
end
!
!
SW1
!
!
interface Port-channel14
switchport trunk encapsulation isl
switchport mode trunk
spanning-tree mst 1-2 port-priority 0
!
Any Ideas are welcome!
This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:55 ART