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Forum Discussion

Gonzalo_Arce_17's avatar
Gonzalo_Arce_17
Icon for Nimbostratus rankNimbostratus
Mar 31, 2016

vlan failsafe don`t work on vcmp guest

Hello,   I have a 2x5250V (VCMP). I have installed three guests (Prod,dmz and QA) on both of them host. These Guests are connected on the same Vlans for HA & the following vlan for each guest:   ...
application delivery
LTM
vcmp
vlan failsafe
tatmotiv's avatar
tatmotiv
Icon for Cirrostratus rankCirrostratus
Mar 31, 2016

VLAN failsafe will watch for traffic on the VLAN and generate some traffic itself (ARP requests) after some time when it has detected a possible loss of connectivity. When running VLAN failsafe on several vCMP guests on the same vCMP host that share one VLAN with VLAN failsafe activated, the traffic generated on one guest by the VLAN failsafe mechanism itself will be detected by the other vCMP guests' VLAN failsafe mechanisms. This is due to the fact that the vCMP guests themselves are connected with each other via the virtual switch within the vCMP hypervisor. Thus, inter-guest traffic will not need to leave the vCMP host, so VLAN failsafe will never get triggered in this constellation, even if there is a "real" loss of connectivity (e.g. switch outage).