dual-active detection and fast hellos

[Eric R. Jones]

Good morning, I'm trying to deploy 2 WS 6509 E chassis with 152 1 SY1a advanced enterprise mk 9 IOS using dual-active detection with fast hellos.

When I enter the configuration commands:

interface port-channel 10
description vsl link from switch 1
switch virtual link 1
shutdown
exit
exit

switch virtual domain 20
shutdown
exit
exit

!switch convert mode virtual

switch virtual domain 20
switch 1

I get to this point and there's no such command "dual-active" available.

So at this point I get "^" symbol and the configuration fails from here on.

dual-active detection pagp
dual-active detection pagp trust channel-group 10
!dual-active fast-hello
!dual-active exclude interface "management ports"
exit

interface port-channel 10
no shutdown
exit

Has anyone dealt with this configuration on the newer Sup 2T blades with 152 - 1 SYA1 IOS file?

ej

[Rolf Fischer]

Hello,

!dual-active fast-hello

Is this a typo? The correct syntax is 'dual-active detection fast-hello', but normally it is not necessary to enable fast-hello because it is enabled by default.

You can check the status with the command 'show switch virtual dual-active fast-hello'; this command has the optional keywords 'counters' and 'packets'

HTH
Rolf

[Eric R. Jones]

Thanks for the reply.

Yes that was a typo and I have read that this function is on by default; however, I was directed to turn on dual-active detection. With this in mind is the below correct?

switch virtual domain 20
switch 1
dual-active detection pagp
dual-active detection pagp trust channel-group 10
dual-active detection fast-hello
dual-active exclude interface "management ports"
exit

or is this one correct eliminating the dual-active detection fast-hello?

switch virtual domain 20
switch 1
dual-active detection pagp
dual-active detection pagp trust channel-group 10
dual-active exclude interface "management ports"
exit

I understand what it's supposed to do and thought I understood how to configure it; however, when not seeing "dual-active" command I began to wonder if this configuration is IOS specific.

Sine we are running s2t54-adventerprisek9-mz.SPA.152-1.SY1a.bin and all the descriptions relate to version 12.2 I began to wonder if there is a different method.

ej

[Rolf Fischer]

or is this one correct eliminating the dual-active detection fast-hello?

No; if you want to disable DAD fast-hello, you need to configure

(config-vs-domain)#no dual-active detection fast-hello

However, apart from testings I see no reason to disable it.