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New Member

Gigastack Problem ?

Hello,

I've two WS-C2950G-48-EI in the stack and few other cat2950 in star topology uplinked by fastethernet. What I just see now is constantly the gigabitethernet is going up&down. I found on cisco:

http://www.cisco.com/en/US/products/hw/modules/ps872/products_module_installation_guide_chapter09186a008007d1e4.html

and tried to put command :no gigastack loop-breaking [interface-id] global configuration command - but switch didn't recognize this command. Next thing - theses two switches running the same iso Version 12.1(12c)EA1, but the others(which are not in stack Version 12.1(9)EA1) - cisco papers says that all switches shoud run the same ios - does also the ones which are not in stack shoud be upgraded ??

Please give me any advice.

TIA,

Mark

here are the logs :

1y3w: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to up

1y3w: %GIGASTACK-1-NO_LOOP_DETECT: The link neighbor of link 1 of Gigastack GBIC

in Gi0/2 did not respond to the loop detection request. If loop topology is dep

loyed, make sure all switches in the stack are running the latest software.

--------

state to upGigabitEthernet0/1 Internal-LINK_B: SYNC_LOST_EVENT (NORMAL_STATE ->

SYNC_LOST_STATE)

GigabitEthernet0/1 Internal-LINK_B: SYNC_OK_EVENT (SYNC_LOST_STATE ->

1y4w: Razor loop breaking state machine started on gigastack Gi0/1 link 1.EXCHA

NGE_SELF_MAC_STATE)

GigabitEthernet0/1 OthrLink-LINK_A: SYNC_OK_INT_RCVD_EVENT (SYNC_LOST_STATE

->SYNC_LOST_STATE)

GigabitEthernet0/1 External-LINK_B: LPBR_START_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->

1y4w: Razor loop breaking state machine started on gigastack Gi0/1 link 1.EXCHA

NGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: LINK_NEIGHBOR_NORMAL_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

1y4w: Gigastack Gi0/1 link 1 rcvd mac: 0008.e375.daf2 link 0GigabitEthernet0/1

External-LINK_B: MAC_X_EXT_RCVD_EVENT (EXCHANGE_SELF_MAC_STATE ->EXCHANGE_SELF

_MAC_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (EXCHANGE_SELF_MAC_STATE

->EXCHANGE_SELF_MAC_STATE)

GigabitEthernet0/1 OthrLink-LINK_A: MAC_INT_RCVD_EVENT (SYNC_LOST_STATE ->SYNC_

LOST_STATE)

GigabitEthernet0/1 External-LINK_B: SYNC_LOST_EXT_RCVD_EVENT (EXCHANGE_SELF_M

AC_STATE ->WAIT_FOR_NORMAL_STATE)

GigabitEthernet0/1 External-LINK_B: ACK_MAC_X_EVENT (WAIT_FOR_NORMAL_STATE -

2 REPLIES
Bronze

Re: Gigastack Problem ?

For 2950 switches, that is the INTERFACE configuration command and also note that it is HIDDEN command, so that you need to type full command. Before entering this command, ensure that no loops are there in your network.

New Member

Re: Gigastack Problem ?

Try to upgrade IOS Version 12.1(9)EA1) to minimum version 12.1(14)... It is known bug as far as I know.

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