Spanning Tree 2960-VLAN13 FastEthernet0/19: chunk 1 ref 6 bpdu cnt 6, next 14 len 35

Meylaers Jan · ‎08-29-2012

Is this because there is a L2 problem?

I do understand spanning tree but there is a but of confusion in the logs. Right now I am busy with optaining my ccnp switch, route and Tshoot but I've got my mind stuck on the output below about Fastethernet fa0/19.

When I enter the debug spanning-tree all command it gives me the below info.

What would the outcome of FA0/19 mean?

Wed Aug 29 16:11:34 2012: <191>1053: 2d03h: STP: opt: VLAN0013: freeing opt chunk 0

Wed Aug 29 16:11:34 2012: <191>1054: 2d03h: STP: opt: VLAN0013: freeing opt chunk 2

Wed Aug 29 16:11:34 2012: <191>1055: 2d03h: STP SW: FAST TX: VLAN13 FastEthernet0/19: chunk 1 ref 6 bpdu cnt 6, next 14 len 35

Wed Aug 29 16:11:34 2012: <191>1056: 2d03h: STP SW: FAST TX: 0180.c200.0000<-0019.06a7.1415 type/len 0026

Wed Aug 29 16:11:35 2012: <191>1057: 2d03h: encap SAP linktype ieee-st vlan 13 len 60 on v13 Fa0/19

Wed Aug 29 16:11:35 2012: <191>1058: 2d03h: 42 42 03 SPAN

Wed Aug 29 16:11:35 2012: <191>1059: 2d03h: CFG P:0000 V:00 T:00 F:00 R:600D 0018.ba21.b180 00000004

Wed Aug 29 16:11:35 2012: <191>1060: 2d03h: B:800D 0019.06a7.1400 80.15 A:0100 M:1400 H:0200 F:0F00

Wed Aug 29 16:11:35 2012: <191>1061: 2d03h: STP SW: FAST TX: VLAN13: free chunk 1

Wed Aug 29 16:11:35 2012: <191>1062: 2d03h: STP: opt: VLAN0013: freeing opt chunk 1

Wed Aug 29 16:11:36 2012: <191>1063: 2d03h: STP: opt: VLAN0013: get ports: chunk 0 allocated

Wed Aug 29 16:11:36 2012: <191>1064: 2d03h: STP SW: TX: opt: VLAN13: bpdu cnt 20, chunk 0

Wed Aug 29 16:11:36 2012: <191>1065: 2d03h: STP SW: TX: opt: VLAN13: ieee chunk 1, sstp chunk 2

Wed Aug 29 16:11:36 2012: <191>1066: 2d03h: STP SW: TX: opt: VLAN13: ieee port count 20, sstp port count 0

Wed Aug 29 16:11:36 2012: <191>1067: 2d03h: optimized ieee bpdus to be sent on chunk 1

Wed Aug 29 16:11:36 2012: <191>1068: 2d03h: idb FastEthernet0/1, vlan 13

Wed Aug 29 16:11:36 2012: <191>1069: 2d03h: idb FastEthernet0/2, vlan 13

Wed Aug 29 16:11:36 2012: <191>1070: 2d03h: idb FastEthernet0/3, vlan 13

Wed Aug 29 16:11:36 2012: <191>1071: 2d03h: idb FastEthernet0/4, vlan 13

Wed Aug 29 16:11:36 2012: <191>1072: 2d03h: idb FastEthernet0/6, vlan 13

Wed Aug 29 16:11:36 2012: <191>1073: 2d03h: idb FastEthernet0/7, vlan 13

Wed Aug 29 16:11:36 2012: <191>1074: 2d03h: idb FastEthernet0/8, vlan 13

Wed Aug 29 16:11:36 2012: <191>1075: 2d03h: idb FastEthernet0/10, vlan 13

Wed Aug 29 16:11:36 2012: <191>1076: 2d03h: idb FastEthernet0/11, vlan 13

Wed Aug 29 16:11:36 2012: <191>1077: 2d03h: idb FastEthernet0/12, vlan 13

Wed Aug 29 16:11:36 2012: <191>1078: 2d03h: idb FastEthernet0/14, vlan 13

Wed Aug 29 16:11:36 2012: <191>1079: 2d03h: idb FastEthernet0/15, vlan 13

Wed Aug 29 16:11:36 2012: <191>1080: 2d03h: idb FastEthernet0/16, vlan 13

Wed Aug 29 16:11:36 2012: <191>1081: 2d03h: idb FastEthernet0/17, vlan 13

Wed Aug 29 16:11:36 2012: <191>1082: 2d03h: idb FastEthernet0/19, vlan 13

Wed Aug 29 16:11:36 2012: <191>1083: 2d03h: idb FastEthernet0/20, vlan 13

Wed Aug 29 16:11:36 2012: <191>1084: 2d03h: idb FastEthernet0/21, vlan 13

Wed Aug 29 16:11:36 2012: <191>1085: 2d03h: idb FastEthernet0/22, vlan 13

Wed Aug 29 16:11:36 2012: <191>1086: 2d03h: idb FastEthernet0/23, vlan 13

Wed Aug 29 16:11:36 2012: <191>1087: 2d03h: idb FastEthernet0/24, vlan 13

thx!

juan_diego_rodriguez · ‎09-17-2012

What you see on the output means that your switch is connected or is using a monitoring protocol as SPAN and is forwarding traffic by fa0/9. SPAN copies the traffic from a port of the switch to another switch that is connected to a network analyzer or monitoring device. Also copies traffic received, sent, or both, in ports or source VLANs to a destination port for analysis.

If this answer was satisfactory for you, please mark the question as Answered.