06-26-2006 11:11 AM - edited 03-03-2019 03:49 AM
I have a CAT4006 with 2 layer-2 uplinks to 2 CAt3750 switches respectively
CAT4006 as PLWARBITES008 connected to:
Connection 1
============
PLWARBITES008 (G1/1)connected to PLWARBITMP001 (G1/0/8)
Note: Connection down
Connection 2
============
PLWARBITES008 (G1/2)connected to PLWARBITMP002 (G1/0/8)
NOte: Connection is up
The connection 1 is down, however,
if I show cdp nei G1/1 in PLWARBITES008,
(Seems connected to itself)
I got this:
PLWARBITES008#sh cdp nei GigabitEthernet1/1 det
-------------------------
Device ID: PLWARBITES008
Entry address(es):
IP address: 134.1.1.1
Platform: cisco WS-C4006, Capabilities: Switch IGMP
Interface: GigabitEthernet1/1, Port ID (outgoing port): GigabitEthernet1/1
Holdtime : 145 sec
Version :
Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I5S-M), Version 12.2(25)EWA1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
However, in PLWARBITMP001 (g1/0/80), the serial and line protocol are down. Can I know why is it like that?
06-26-2006 12:06 PM
Hi:
That is called PVSTP , Per vlan Spanning tree protocol. It is default feature with L2 & L3 switches of Cisco. One connection is in forwarding state & one is in blocking state.
regards
Sandipani C
06-26-2006 12:41 PM
I thought PVSTP will not shut down the port? Only set is "blocking" state?
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