The last character of the Partner Name and Partner Port information in the output of the show etherchannel port EXEC command on Catalyst 2950 Series switches is truncated.
The information is carried in the Device Name and Physical Port Name TLVs in the PAgP packets.
This is applicable for PAgP only.
First found in c2950-i6k2l2q4-mz.121-22.EA10a.bin.
C2950#sh ver | in IOS|Compiled IOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA14, RELEASE SOFTWARE (fc1) Compiled Tue 26-Oct-10 10:35 by nburra C2950# C2950#sh run int fa0/9 Building configuration... Current configuration : 88 bytes ! interface FastEthernet0/9 switchport mode trunk channel-group 1 mode desirable end C2950# C2950#sh run int fa0/10 Building configuration... Current configuration : 89 bytes ! interface FastEthernet0/10 switchport mode trunk channel-group 1 mode desirable end C2950# C2950#sh run int po1 Building configuration... Current configuration : 54 bytes ! interface Port-channel1 switchport mode trunk end C2950# ================================================================================ C3560#sh run int fa0/9 Building configuration... Current configuration : 126 bytes ! interface FastEthernet0/9 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode desirable end C3560# C3560#sh run int fa0/10 Building configuration... Current configuration : 127 bytes ! interface FastEthernet0/10 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode desirable end C3560# C3560#sh run int po1 Building configuration... Current configuration : 92 bytes ! interface Port-channel1 switchport trunk encapsulation dot1q switchport mode trunk end C3560#
C2950# 00:14:33: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up 00:14:34: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to up 00:14:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up 00:14:38: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up 00:14:38: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up 00:14:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up C2950# C2950#sh cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone Device ID Local Intrfce Holdtme Capability Platform Port ID C3560 Fas 0/10 179 S I WS-C3560-4Fas 0/10 C3560 Fas 0/9 179 S I WS-C3560-4Fas 0/9 C2950# C2950#sh etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 u - unsuitable for bundling U - in use f - failed to allocate aggregator d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) PAgP Fa0/9(Pd) Fa0/10(P) C2950# C2950#sh etherchannel port Channel-group listing: ---------------------- Group: 1 ---------- Ports in the group: ------------------- Port: Fa0/9 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Desirable-Sl Gcchange = 0 Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = PAgP Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. d - PAgP is down. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Fa0/9 SC U6/S7 H 30s 1 128 Any 29 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Fa0/9 C356 0023.04a3.5c80 Fa0/ 8s SC 10001 Age of the port in the current state: 0d:00h:00m:09s Port: Fa0/10 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Desirable-Sl Gcchange = 0 Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = PAgP Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. d - PAgP is down. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Fa0/10 SC U6/S7 H 30s 1 128 Any 29 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Fa0/10 C356 0023.04a3.5c80 Fa0/1 9s SC 10001 Age of the port in the current state: 0d:00h:00m:09s C2950# C2950#sh etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 ------------ Age of the Port-channel = 0d:00h:06m:08s Logical slot/port = 1/0 Number of ports = 2 GC = 0x00010001 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = PAgP Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/9 Desirable-Sl 0 0 00 Fa0/10 Desirable-Sl 0 Time since last port bundled: 0d:00h:00m:10s Fa0/10 C2950# ================================================================================ C3560# 00:13:41.320: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up 00:13:41.949: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to up 00:13:45.304: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up 00:13:45.967: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up 00:13:46.286: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up 00:13:47.292: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up C3560# C3560#sh cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone, D - Remote, C - CVTA, M - Two-port Mac Relay Device ID Local Intrfce Holdtme Capability Platform Port ID C2950 Fas 0/10 169 S I WS-C2950T Fas 0/10 C2950 Fas 0/9 168 S I WS-C2950T Fas 0/9 C3560# C3560#sh etherchannel summary Flags: D - down P - bundled in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use f - failed to allocate aggregator M - not in use, minimum links not met u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) PAgP Fa0/9(P) Fa0/10(P) C3560# C3560#sh etherchannel port Channel-group listing: ---------------------- Group: 1 ---------- Ports in the group: ------------------- Port: Fa0/9 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Desirable-Sl Gcchange = 0 Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = PAgP Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. d - PAgP is down. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Fa0/9 SC U6/S7 H 30s 1 128 Any 5001 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Fa0/9 C2950 0011.2029.6800 Fa0/9 13s SC 10001 Age of the port in the current state: 0d:00h:00m:13s Port: Fa0/10 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Desirable-Sl Gcchange = 0 Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = PAgP Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. d - PAgP is down. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Fa0/10 SC U6/S7 H 30s 1 128 Any 5001 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Fa0/10 C2950 0011.2029.6800 Fa0/10 14s SC 10001 Age of the port in the current state: 0d:00h:00m:13s C3560# C3560#sh etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 ------------ Age of the Port-channel = 0d:00h:05m:42s Logical slot/port = 2/1 Number of ports = 2 GC = 0x00010001 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = PAgP Port security = Disabled Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/9 Desirable-Sl 0 0 00 Fa0/10 Desirable-Sl 0 Time since last port bundled: 0d:00h:00m:15s Fa0/10 C3560#
Below shows the command output for the same network setup with LACP for the sake of completeness and comparison. :-)
C2950#sh run int fa0/9 Building configuration... Current configuration : 85 bytes ! interface FastEthernet0/9 switchport mode trunk channel-group 1 mode active end C2950# C2950#sh run int fa0/10 Building configuration... Current configuration : 86 bytes ! interface FastEthernet0/10 switchport mode trunk channel-group 1 mode active end C2950# C2950#sh run int po1 Building configuration... Current configuration : 54 bytes ! interface Port-channel1 switchport mode trunk end C2950# 00:22:08: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up 00:22:08: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to up 00:22:12: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up 00:22:12: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up 00:22:13: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up 00:22:14: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up C2950# C2950#sh cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone Device ID Local Intrfce Holdtme Capability Platform Port ID C3560 Fas 0/10 175 S I WS-C3560-4Fas 0/10 C3560 Fas 0/9 175 S I WS-C3560-4Fas 0/9 C2950# C2950#sh etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 u - unsuitable for bundling U - in use f - failed to allocate aggregator d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) LACP Fa0/9(Pd) Fa0/10(P) C2950# C2950#sh etherchannel port Channel-group listing: ---------------------- Group: 1 ---------- Ports in the group: ------------------- Port: Fa0/9 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Active Gcchange = - Port-channel = Po1 GC = - Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = LACP Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs. A - Device is in active mode. P - Device is in passive mode. Local information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Fa0/9 SA bndl 32768 0x1 0x1 0x9 0x3D Partner's information: LACP port Oper Port Port Port Flags Priority Dev ID Age Key Number State Fa0/9 SA 32768 0023.04a3.5c80 9s 0x1 0x10C 0x3D Age of the port in the current state: 0d:00h:00m:08s Port: Fa0/10 ------------ Port state = Up Mstr In-Bndl Channel group = 1 Mode = Active Gcchange = - Port-channel = Po1 GC = - Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = LACP Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs. A - Device is in active mode. P - Device is in passive mode. Local information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Fa0/10 SA bndl 32768 0x1 0x1 0xA 0x3D Partner's information: LACP port Oper Port Port Port Flags Priority Dev ID Age Key Number State Fa0/10 SA 32768 0023.04a3.5c80 9s 0x1 0x10D 0x3D Age of the port in the current state: 0d:00h:00m:08s C2950# C2950#sh etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 (Primary Aggregator) ------------ Age of the Port-channel = 0d:00h:01m:25s Logical slot/port = 1/0 Number of ports = 2 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = LACP Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/9 Active 0 0 00 Fa0/10 Active 0 Time since last port bundled: 0d:00h:00m:10s Fa0/10 C2950# ================================================================================ C3560#sh run int fa0/9 Building configuration... Current configuration : 123 bytes ! interface FastEthernet0/9 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode active end C3560# C3560#sh run int fa0/10 Building configuration... Current configuration : 124 bytes ! interface FastEthernet0/10 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode active end C3560# C3560#sh run int po1 Building configuration... Current configuration : 92 bytes ! interface Port-channel1 switchport trunk encapsulation dot1q switchport mode trunk end C3560# 00:21:15.848: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up 00:21:16.519: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to up 00:21:19.883: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up 00:21:20.588: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up 00:21:20.864: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up 00:21:21.871: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up C3560# C3560#sh cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone, D - Remote, C - CVTA, M - Two-port Mac Relay Device ID Local Intrfce Holdtme Capability Platform Port ID C2950 Fas 0/10 178 S I WS-C2950T Fas 0/10 C2950 Fas 0/9 178 S I WS-C2950T Fas 0/9 C3560# C3560#sh etherchannel summary Flags: D - down P - bundled in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use f - failed to allocate aggregator M - not in use, minimum links not met u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) LACP Fa0/9(P) Fa0/10(P) C3560# C3560#sh etherchannel port Channel-group listing: ---------------------- Group: 1 ---------- Ports in the group: ------------------- Port: Fa0/9 ------------ Port state = Up Mstr Assoc In-Bndl Channel group = 1 Mode = Active Gcchange = - Port-channel = Po1 GC = - Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = LACP Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs. A - Device is in active mode. P - Device is in passive mode. Local information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Fa0/9 SA bndl 32768 0x1 0x1 0x10C 0x3D Partner's information: LACP port Admin Oper Port Port Port Flags Priority Dev ID Age key Key Number State Fa0/9 SA 32768 0011.2029.6800 12s 0x0 0x1 0x9 0x3D Age of the port in the current state: 0d:00h:00m:11s Port: Fa0/10 ------------ Port state = Up Mstr Assoc In-Bndl Channel group = 1 Mode = Active Gcchange = - Port-channel = Po1 GC = - Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Protocol = LACP Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs. A - Device is in active mode. P - Device is in passive mode. Local information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Fa0/10 SA bndl 32768 0x1 0x1 0x10D 0x3D Partner's information: LACP port Admin Oper Port Port Port Flags Priority Dev ID Age key Key Number State Fa0/10 SA 32768 0011.2029.6800 13s 0x0 0x1 0xA 0x3D Age of the port in the current state: 0d:00h:00m:12s C3560# C3560#sh etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 (Primary Aggregator) ------------ Age of the Port-channel = 0d:00h:01m:12s Logical slot/port = 2/1 Number of ports = 2 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = LACP Port security = Disabled Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/9 Active 0 0 00 Fa0/10 Active 0 Time since last port bundled: 0d:00h:00m:13s Fa0/10 C3560#
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