I can't get the Etherchannel to work on my 3550 <--> 2950.
Everything is configured properly, but still etherchannel sometimes brings both of the interfaces up and sometimes shuts one of them down, for no reason. Cables are same, configs same, everything exactly same. I already looked up the error message talking something about balun cable. I am not sure what kind of cable is balun, but I used normal CAT5 crossover cables between switches. Please if anyone has any suggestions, I would really appreciated.
2950 is configured through PO1 (on fa0/23, fa0/24) to PO8 on 3550 (on fa0/44, fa0/43)
Here is the configs:
3550:
!##################################
! Created by Senad P. on May 2003
!##################################
!
! Last configuration change at 10:19:08 MST Thu May 15 2003
!
version 12.1
no service single-slot-reload-enable
no service pad
service timestamps debug datetime
service timestamps log datetime
service password-encryption
!
hostname D2-2001
!
clock timezone MST -7
!
vlan 233
!
vlan 234
!
vtp domain wb
vtp mode transparent
!
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
interface Port-channel8
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
!
... SHORTENED BECAUSE OF CHARRACTER LIMITATION
interface Port-channel9
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
!
interface Port-channel10
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
!
interface FastEthernet0/1
switchport access vlan dynamic
no ip address
no logging event link-status
speed 100
duplex full
no snmp trap link-status
storm-control broadcast level 70.00
storm-control multicast level 70.00
storm-control unicast level 85.00
spanning-tree portfast trunk
!
interface FastEthernet0/2
switchport access vlan dynamic
no ip address
no logging event link-status
speed 100
duplex full
no snmp trap link-status
storm-control broadcast level 70.00
storm-control multicast level 70.00
storm-control unicast level 85.00
spanning-tree portfast trunk
!
SHORTENED BECASUE OF CHARACTER LIMITATION
!
interface FastEthernet0/44
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 8 mode on
!
interface FastEthernet0/45
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 9 mode on
!
interface FastEthernet0/46
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 9 mode on
!
interface FastEthernet0/47
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 10 mode on
!
interface FastEthernet0/48
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 10 mode on
!
interface GigabitEthernet0/1
description "UPLINK TO CAT6509"
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
!
interface GigabitEthernet0/2
no ip address
!
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
interface Vlan234
ip address 137.190.x.x 255.255.x.x
no ip route-cache
!
ip default-gateway 137.190.x.x
ip classless
no ip http server
!
2950:
sh run
Building configuration...
vlan 234
!
vlan 243
!
vtp domain wb
vtp version 2
vtp mode transparent
!
vmps server 137.190.
!
interface FastEthernet0/1
switchport access vlan dynamic
no ip address
no logging event link-status
speed 100
duplex full
no snmp trap link-status
storm-control broadcast level 70.00
storm-control multicast level 70.00
storm-control unicast level 85.00
storm-control action trap
spanning-tree portfast trunk
!
interface FastEthernet0/2
switchport access vlan dynamic
no ip address
no logging event link-status
speed 100
duplex full
no snmp trap link-status
storm-control broadcast level 70.00
storm-control multicast level 70.00
storm-control unicast level 85.00
storm-control action trap
spanning-tree portfast
!
SHORTENED BECAUSE OF CHARACTER LIMITATION
!
interface FastEthernet0/23
description "UPLINK TO 3550"
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 1 mode on
!
interface FastEthernet0/24
description "UPLINK TO 3550"
switchport mode trunk
no ip address
speed 100
duplex full
channel-group 1 mode on
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
interface Vlan234
ip address 137.190. 255.255.
no ip route-cache
!
ip default-gateway 137.190.
D2-2003#
#
#%ETHCNTR-3-LOOP_BACK_DETECTED
#
Here is the DEBUG LOG from 2950:
May 21 20:27:57: FEC: pagp_switch_find_master: group 1
May 21 20:27:57: FEC: fec_bundle: Fa0/24
May 21 20:27:57: FEC: add port (Fa0/24) to agport (Po1)
May 21 20:27:57: FEC: fec_set_agport_macaddr: Po1 Fa0/24 (add)
May 21 20:27:57: FEC: pagp_switch_add_port_to_agport: msg to PM to bundle port Fa0/24 with Po1
May 21 20:27:57: FEC: pagp_switch_want_to_bundle: Bndl msg to PM for port Fa0/24 to Agport Po1
May 21 20:27:57: FEC: pagp_switch_hotstandby: for agport Po1
May 21 20:27:57: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
May 21 20:27:57: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
May 21 20:27:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to up
May 21 20:27:59: %LINK-3-UPDOWN: Interface FastEthernet0/23, changed state to up
May 21 20:27:59: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
May 21 20:28:00: FEC: pagp_switch_port_up: Fa0/23
May 21 20:28:00: FEC: pagp_switch_invoke_port_up: Fa0/23
May 21 20:28:00: FEC: pagp_switch_agc_compatable: comparing GC values of Fa0/23 Fa0/24 flag = 1 1
--More-- May 21 20:28:00: FEC: pagp_switch_port_attrib_diff: Fa0/23 Fa0/24 same
May 21 20:28:00: FEC: pagp_switch_agc_compatable: GC values are compatable
May 21 20:28:00: FEC: fec_bundle: Fa0/23
May 21 20:28:00: FEC: add port (Fa0/23) to agport (Po1)
May 21 20:28:00: FEC: fec_set_agport_macaddr: Po1 Fa0/23 (add)
May 21 20:28:00: FEC: pagp_switch_add_port_to_agport: msg to PM to bundle port Fa0/23 with Po1
May 21 20:28:00: FEC: pagp_switch_want_to_bundle: Bndl msg to PM for port Fa0/23 to Agport Po1
May 21 20:28:00: FEC: pagp_switch_hotstandby: for agport Po1
May 21 20:28:00: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
May 21 20:28:00: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
May 21 20:28:00: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
May 21 20:28:01: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/23, changed state to up
May 21 20:28:55: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on FastEthernet0/24. The port is forced to linkdown.
May 21 20:28:55: FEC: pagp_switch_hotstandby: for agport Po1
May 21 20:28:55: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
May 21 20:28:55: FEC: pagp_switch_port_down: Fa0/24
May 21 20:28:55: FEC: pagp_switch_invoke_port_down: Fa0/24
--More-- May 21 20:28:55: FEC: fec_unbundle: Fa0/24
May 21 20:28:55: FEC: pagp_switch_delete_port_from_agport: delete_port_from_agport: for port Fa0/24
May 21 20:28:55: FEC: delete port (Fa0/24) from agport (Po1)
May 21 20:28:55: FEC: pagp_switch_remove_from_bundle: Un-Bndl msg NOT send to PM for port Fa0/24 from Po1
May 21 20:28:55: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
May 21 20:28:55: FEC: fec_set_agport_macaddr: Po1 Fa0/24 (remove)
May 21 20:28:56: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to down
May 21 20:31:21: %LINK-3-UPDOWN: Interface FastEthernet0/24, changed state to up
May 21 20:31:22: FEC: pagp_switch_port_up: Fa0/24
May 21 20:31:22: FEC: pagp_switch_invoke_port_up: Fa0/24
May 21 20:31:22: FEC: pagp_switch_agc_compatable: comparing GC values of Fa0/24 Fa0/23 flag = 1 1
May 21 20:31:22: FEC: pagp_switch_port_attrib_diff: Fa0/24 Fa0/23 same
May 21 20:31:22: FEC: pagp_switch_agc_compatable: GC values are compatable
May 21 20:31:22: FEC: fec_bundle: Fa0/24
May 21 20:31:22: FEC: add port (Fa0/24) to agport (Po1)
May 21 20:31:22: FEC: fec_set_agport_macaddr: Po1 Fa0/24 (add)
May 21 20:31:22: FEC: pagp_switch_add_port_to_agport: msg to PM to bundle port Fa0/24 with Po1
--More-- May 21 20:31:22: FEC: pagp_switch_want_to_bundle: Bndl msg to PM for port Fa0/24 to Agport Po1
May 21 20:31:22: FEC: pagp_switch_hotstandby: for agport Po1
May 21 20:31:22: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
May 21 20:31:22: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
May 21 20:31:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to up
D2-3003#
