Cisco 6509 supervisor engine redundancy

[jenson brocky]

Hello,Anyone could advise is there any downtime impacted to the LAN client devices if I reboot one of my active supervisor engine to standby supervisor engine on Cisco6509. Will it be seemless to the LAN client devices?

[Masoud Pourshabanian]

Hello,

If you reboot your standby supervisor no. If you reboot your active supervisor, it will have impact  just for a short period of time. Some seconds.

Make sure your standby supervisor works properly by "show redundancy" command and SSO is set.

Hope it helps.

[jenson brocky]

Hello,

       Thanks for your reply. So it means it not seemless and there will be drop of packets in terms of active/standby supervisor engine switchover for Cisco 6509.  

[Masoud Pourshabanian]

Yes, you will have some drops depending on your configuration. If SSO mode is set, downtime would be short. Around 1 to 10 seconds. But if RTR is set, downtime will be more than 30 seconds.

Masoud,

[Masoud Pourshabanian]

Being seemless is relative. It will be seeless for a bunch of users browsing web, but it will not for some applications which even are sensitive to some drops. I usually have 4 to 7 ICMP timeout when I switch. I suggest you to do it in downtime.