Hello, maybe just a bug I found, shutting down the port and re-enabling it "solves" it:
edge1-dus3#sh spanning-tree No spanning tree instance exists. edge1-dus3# kind regards Rolf > Hello, > > I would also guess somthing in that direction if it was > general/reproduceble behaviour, but why does that happen only on this port > ? > I have lots of ports with similar config (mode trunk, everything tagged) > on several boxes and this is the only one listed in "show spanning-tree". > > Config samples: > > interface GigabitEthernet7/2 > switchport > switchport trunk encapsulation dot1q > switchport trunk allowed vlan 666,1153 > switchport mode trunk > load-interval 30 > end > > 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 > > interface TenGigabitEthernet8/2 > switchport > switchport trunk encapsulation dot1q > switchport trunk allowed vlan 1122,1142,1293,1421,1429,1476,3404,3405 > switchport trunk allowed vlan add 3408-3410 > switchport mode trunk > mtu 9216 > load-interval 30 > end > > Only 7/16 is listed and there is nothing on the config beside the above as > far as I see: > > edge1-dus3#sh running-config | inc 7/16 > interface GigabitEthernet7/16 > edge1-dus3# > > kind regards > Rolf > >> You're using 802.1q, which uses an untagged native VLAN for things like >> STP >> BPDUs, CDP, VTP, etc ,etc. Even though you pruned off VLAN 1 via the >> allowed VLANs command, the native VLAN will still be used for >> switch-generated protocols like those listed above. Only >> transit-traffic >> is >> denied by pruning. If you change the native VLAN to something other >> than >> one (do it on both sides, or wacky/painful things can happen), you >> should >> see VLAN 1 no longer on that port. >> >> Chuck >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of "Rolf Hanßen" >> Sent: Tuesday, March 12, 2013 1:34 PM >> To: [email protected] >> 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 >> >> >> >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ >> >> > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
