Problems with REP

[Luis Perez]

I have a ring with four IE3000-8TC switches Sw1, Sw2, Sw3, Sw4

They are configured in this way:

____________________________

Sw1

rep admin vlan 997

int gi1/1

sw mode trunk

rep segment 1 edge primary

int gi1/2

sw mode trunk

rep segment 1 edge

____________________________

Sw2

rep admin vlan 997

int gi1/1

sw mode trunk

rep segment 1

int gi1/2

sw mode trunk

rep segment 1

_____________________

Sw3

rep admin vlan 997

int gi1/1

sw mode trunk

rep segment 1

int gi1/2

sw mode trunk

rep segment 1

______________________

Sw4

rep admin vlan 997

int gi1/1

sw mode trunk

rep segment 1

int gi1/2

sw mode trunk

rep segment 1

The connections are showed in the image attacched, when all conections are working fine rep doesnt have problems and i show the rep topology like this

SW1#sh rep topology

REP Segment 1

BridgeName       PortName   Edge Role

---------------- ---------- ---- ----

SW1                    Gi1/1      Pri  Open

SW2                    Gi1/1           Open

SW2                    Gi1/2           Open

SW3                    Gi1/1           Open

SW3                    Gi1/2           Open

SW4                    Gi1/1           Open

SW4                    Gi1/2           Alt

SW1                    Gi1/2      Sec  Open

But if i disconnect a link in the sw3 the rep topology show the next output and the convergence doesnt works

SW1#sh rep topology

REP Segment 1

Warning: REP detects a segment failure, topology may be incomplete

BridgeName       PortName   Edge Role

---------------- ---------- ---- ----

SW1                    Gi1/1      Sec  Open

SW2                    Gi1/1           Open

SW2                    Gi1/2           Open

SW3                    Gi1/1           Open

SW4                    Gi1/2           Fail

Why I have lost the direct link between SW1 and SW4??

[ปลาวาฬทราย RMUTT CPE IX]

I have quite same this problem but it occurs on ME3400 ring. I went to SW that show fail, shutdown and no shutdown the failed interface. It’s work. But I don’t know why?

System image file is "flash:me340x-metroipaccessk9-mz.122-53.SE.bin"

ac3400combo(config)#int gi0/16

ac3400combo(config-if)#shu

ac3400combo(config-if)#

005830: Feb 16 14:26:45.074 bkk: %REP-4-LINKSTATUS: GigabitEthernet0/16 (segment 1) is non-operational due to port become non-trunk

ac3400combo(config-if)#

005831: Feb 16 14:26:46.818 bkk: %LINK-5-CHANGED: Interface GigabitEthernet0/16, changed state to administratively down

005832: Feb 16 14:26:47.825 bkk: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/16, changed state to down

ac3400combo(config-if)#no shu

ac3400combo(config-if)#

005833: Feb 16 14:27:12.294 bkk: %LINK-3-UPDOWN: Interface GigabitEthernet0/16, changed state to up

005834: Feb 16 14:27:13.301 bkk: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/16, changed state to up

ac3400combo(config-if)#end

ac3400combo#

005835: Feb 16 14:27:16.480 bkk: %REP-4-LINKSTATUS: GigabitEthernet0/16 (segment 1) is operational

Thank you very much.

[Mark Wardle]

Had this problem in a lab I configured today also.  Did you have any luck resolving this?

I've a stacked 3750X with 2x IE-3000 access switches in a REP ring.

SW1                    Gi1/0/1      Pri  Open

SW2                    Gi1/1           Open

SW2                    Gi1/2           Open

SW3                    Gi1/1           Open

SW3                    Gi1/2           Open

SW1                    Gi2/0/1           Sec Alt

REP works fine if I remove the open link connected to the primary edge port.  However if I remove the trunk link between the 2x IE-3000 access switches, REP does not converge.