Solved: Auto Fail over for switch port

jochance209 · ‎01-19-2017

hello is there any way to have a switch port detect that a access port is down, shut the port and no shut another?

we have a very important piece of hardware that has an exact copy running right next to it, and a cold spare on the shelf. as it stands now if the main system fails i have to get in to the system and shut one port and no shut the other to get the backup running this is very rare but would be nice to automate.

i have a 2960x that i am working with

Mark Malone · ‎01-20-2017

Hi

If the 2960 supports flex links you can do it , its very basic fail over 1 active 1 standby l2 link

I see it available in my 2960s and there no X there WS-C2960S-48TS-L , so should be in X series too

please see guide

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/swflink.html#wp1056578

xxxxxxxxxx(config-if)#switchport ?
access         Set access mode characteristics of the interface
autostate      Include or exclude this port from vlan link up calculation
backup         Set backup for the interface
block          Disable forwarding of unknown uni/multi cast addresses
host           Set port host
mode           Set trunking mode of the interface
nonegotiate    Device will not engage in negotiation protocol on this interface
port-security Security related command
priority       Set appliance 802.1p priority
protected      Configure an interface to be a protected port
trunk          Set trunking characteristics of the interface
voice          Voice appliance attributes

View solution in original post

Mark Malone · ‎01-20-2017

Hi

If the 2960 supports flex links you can do it , its very basic fail over 1 active 1 standby l2 link

I see it available in my 2960s and there no X there WS-C2960S-48TS-L , so should be in X series too

please see guide

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/swflink.html#wp1056578

xxxxxxxxxx(config-if)#switchport ?
access         Set access mode characteristics of the interface
autostate      Include or exclude this port from vlan link up calculation
backup         Set backup for the interface
block          Disable forwarding of unknown uni/multi cast addresses
host           Set port host
mode           Set trunking mode of the interface
nonegotiate    Device will not engage in negotiation protocol on this interface
port-security Security related command
priority       Set appliance 802.1p priority
protected      Configure an interface to be a protected port
trunk          Set trunking characteristics of the interface
voice          Voice appliance attributes

jochance209 · ‎01-23-2017

i do have the commanded available, what is the state of the backup port once selected? i am going to do some testing myself.

jochance209 · ‎01-23-2017

per the documentation its is in standby mode

"Configure a physical Layer 2 interface (or port channel) as part of a Flex Link pair with the interface. When one link is forwarding traffic, the other interface is in standby mode."

Mark Malone · ‎01-23-2017

This is a layer 1 failover basic , so the system will have to go down or the actual cable/link fail for it to work , switchport needs to see itself down at layer 1 ...down/down before it will failover

jochance209 · ‎01-23-2017

cool ya i think this will work for me, thanks for the help and advice.

Mark Malone · ‎01-23-2017

it will go to standby state and only activate when when there is a failure

Switch# show interface switchport backup

Switch Backup Interface Pairs:

Active Interface        Backup Interface        State

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

FastEthernet1/0/1         FastEthernet1/0/2         Active Up/Backup Standby