[c-nsp] STP active/listed on wrong port
Harold 'Buz' Dale
buz.dale at usg.edu
Tue Mar 12 14:21:07 EDT 2013
Sure - It's a trunk. VLAN one is the native vlan the tagged frames flow over...
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of "Rolf Hanßen"
Sent: Tuesday, March 12, 2013 13:34
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] STP active/listed on wrong port
Hello list,
do you have an explanation why STP thinks Gi7/16 belongs to vlan 1 ?
edge1-dus3#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 5475.d0a6.75c0
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 5475.d0a6.75c0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------
Gi7/16 Desg FWD 4 128.1552 P2p
Interface Config:
interface GigabitEthernet7/16
description custsw2-dus1 A16
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1253,1606 switchport mode trunk mtu 9216 load-interval 30 end
STP is disabled on all other vlans:
no spanning-tree vlan 2-4000
Gi7/16 is not listed here:
edge1-dus3#sh vlan id 1
VLAN Name Status Ports
---- -------------------------------- ---------
-------------------------------
1 default active Gi1/5, Gi1/8, Gi1/13,
Gi1/25, Gi1/27, Gi1/48, Te4/1, Gi6/1, Gi7/1, Gi7/3, Gi7/4, Gi7/5, Gi7/6, Gi7/7, Gi7/8, Gi7/9, Gi7/10, Gi7/11, Gi7/12, Gi7/13, Gi7/14, Gi7/15, Gi7/17, Gi7/18, Gi7/19
Gi7/20, Gi7/21, Gi7/22, Gi7/23, Gi7/24
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1
Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------
------
1 enet 100001 1500 - - - - - 0 0
Remote SPAN VLAN
----------------
Disabled
Primary Secondary Type Ports
------- --------- -----------------
------------------------------------------
Port is up and works fine:
edge1-dus3#sh int Gi7/16
GigabitEthernet7/16 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 001d.a246.3743 (bia
001d.a246.3743)
Description: custsw2-dus1 A16
MTU 9216 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 6/255, rxload 6/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is LX
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 27117000 bits/sec, 3517 packets/sec
30 second output rate 24383000 bits/sec, 2860 packets/sec
32078138057 packets input, 32998390284372 bytes, 0 no buffer
Received 524965 broadcasts (173874 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
13839785752 packets output, 9991981200426 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
edge1-dus3#sh version
Cisco IOS Software, c7600s72033_rp Software (c7600s72033_rp-ADVIPSERVICESK9-M), Version 15.1(2)S, RELEASE SOFTWARE
(fc1)
Hardware is Cisco 7609-S, Sub720-3BXL, Slot 7 is a WS-X6724-SFP
kind regards
Rolf Hanßen
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