eigrp convergence for topology route

gajanangavli · ‎12-01-2009

Hi ,

i have backup route in eigrp topology , how much time eigrp will take to make it active when primary route disappeare.

Is it 2 second , any cisco document for it ?

Jon Marshall · ‎12-01-2009

gajanangavli wrote:

Hi ,

i have backup route in eigrp topology , how much time eigrp will take to make it active when primary route disappeare.

Is it 2 second , any cisco document for it ?

If by backup route you mean a feasible successor then once EIGRP has lost the primary route it should be failry instantaneous because it has no need to qurey any other routers.

Jon

gajanangavli · ‎12-01-2009

Thanks for your help.Do we have any cisco document for it.?

Jon Marshall · ‎12-01-2009

gajanangavli wrote:

Thanks for your help.Do we have any cisco document for it.?

Have a look at this white paper on EIGRP -

http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml#feasibleandreported

Note the sentence on the part i have linked to about losing a route and having a feasible successor -

"The network converges instantly..."

Jon