I think the vif favor commands does some sorcery to avoid sending a reset to clients with established sessions to that vif. Something like tcp state replication to the other port in the single mode ifgrp. Something like that...
-Blake
On Fri, Jul 20, 2012 at 2:47 PM, Alon Zeltser alonz@emet.co.il wrote:
You can use ifgrp favor command to manually switch network activity to one interface while your network guys work on the passive inferface switch It will be a graceful transfer rathen then the sudden link break when the switch goes down
Sent from Samsung MobileFletcher Cocquyt fcocquyt@stanford.edu wrote:
Our networking team needs to do switch maintenance (hardware and firmware)
Each of our 3270 cluster heads is connected to redundant switch pairs - the ifgrp (aka vif) is setup as a single mode:
ifgrp create single na01-vif0 e1a e1b
Current status (abbreviated for readability):
na01-vif0: 1 link, transmit 'none', Ifgrp Type 'single_mode' fail 'default' Ifgrp Status Up Addr_set up: e1b: state up, since 20Jul2012 12:01:50 (00:41:27) mediatype: auto-10g_sr-fd-up flags: enabled favored
down: e1a: state down, since 20Jul2012 12:02:21 (00:40:56) mediatype: auto-10g_sr-fd-up flags: enabled unfavoredQ: what are the recommended Netapp steps to preserve uptime with the least disruption while the networking folks upgrade each switch in turn?
thanks!
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