NetScaler Interface Tagging and Flow of High Availability Packets Examples

This article describes the flow of High Availability packets when various combinations of tagging are implemented in the NetScaler configuration. For additional information on HA traffic not seen on tagged channels refer to CTX201788.

Flow of High Availability Packets

Heart beats, that is High Availability packets, are always untagged unless the NSVLAN is configured using set ns config -nsvlan command or an interface is configured with the -trunk on option in NetScaler software release 9.2 and earlier or -tagall option in NetScaler software release 9.3 and later.

The following scenarios help in describing the flow of the High Availability packets:

Scenario 1

NSVLAN is default (VLAN 1)

interface 1/1 is bound to VLAN 2

Interface 1/2 is bound to VLAN 3

add vlan 2add vlan 3bind vlan 2 -ifnum 1/1bind vlan 3 -ifnum 1/2


High Availability packets flow as untagged on the 1/1 and 1/2 interfaces on the native VLAN (of those interfaces – 2 and 3 respectively).

Scenario 2

NSVLAN is default (VLAN 1)

interface 1/1 is bound to VLAN 2, which is configured with -trunk ON

Interface 1/2 is bound to VLAN 3, which is configured with -trunk OFF (default)

set interface 1/1 -trunk ONadd vlan 2add vlan 3bind vlan 2 -ifnum 1/1bind vlan 3 -ifnum 1/2


High Availability packets flow on 1/1 as tagged with a VLAN ID of 2 (as all other native packets of this interface), and untagged on the 1/2 interface.

Scenario 3

NSVLAN is VLAN10 (non default)

interface 1/1 is bound to VLAN 2

interface 1/2 is bound to VLAN 3

interface 1/3 is bound to VLAN 10

add vlan 2add vlan 3bind vlan 2 -ifnum 1/1bind vlan 3 -ifnum 1/2set ns config -nsvlan 10 -ifnum 1/3


High Availability packets flow as tagged (default) on VLAN 10, interface 1/3 only and do not flow on VLAN 2 or VLAN 3.

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