Server Failover

[visitor68]

Imagine a dual-homed server to 2 access layer switches and active/standby NIC teaming is used. No conenction between access switches. \

How do you prevent blackholing of traffic when a switch loses its all uplinks? In other words, how does a server know that the access switch has lost its ability to forward traffic?

[Reza Sharifi]

If you are using Etherchannel ,the 2 switches need to know about each other.  That means 3750s stacked,, 6500 VSS or Nexus VPC.

HTH

[massimiliano.serafino]

Hi,

There is an interesting feature called "Link state tracking"

For example look at

http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_25_see/configuration/guide/swethchl.pdf

Hope this helps.

Best regards.

Massimiliano,