Just a few questions on a HA lab to track the user interface. If i configure the primary ACE in the admin-context like this:
ft interface vlan 402 ---->>> FT VLAN
ip address <primary_ip>
peer ip address <secondary_ip>
ft peer 1
heartbeat interval 300
heartbeat count 10
ft-interface vlan 402
ft group 4 --->> group associated to user-context Juniper
priority 200 --->>> primary is 200 and secondary is 100
and in the user-context of the primary ACE:
ft track interface vlan202 ---->>> VLAN 202 is where VIPs are configured in the Juniper user-context
track-interface vlan 202
peer track-interface vlan 202
peer priority 100
1.- the command "peer-track interface" is useful in case the primary ACE and secondary ACE are not connected on vlan 202 via the same single switch? i guess without this command the secondary wouldnt track the user interface 202.
2.- Do i need to specify "peer priority 100" in the user context for the secondary ACE? Is it used to set the priority of the secondary once the primary becomes standby? Default is 100 for secondary so i think its not useful.
3.- Can i configure preempt delay in ACE?
Could you please check 'ft group 4' configuration on your standby ACE?
Probably, you configure 'priority 105' on standby too. If so, please change configuration
from 'priority 105' to 'peer priority 105' on standby ACE.
# active admin context
ft group 4
# standby admin context
ft group 4
peer priority 105 <<==
I checked your configuration and found you configured ft group for Juniper context only.
This means Admin context is not sync'ed. (I was misled into thinking that your admin
context is also sync'ed.)
As you indicated, 'peer track-interface [vlan]' command is to set track interface
to standby ACE. If you don't configure this command, standby ACE doesn't
track vlan interface. By default, since active and standby ACE configurations are
sync'ed, you cannot configure on standby ACE. In stead of configuring standby
ACE, peer commands are implemented.
'peer priority [priority]' on ft track-interface mode is the command to decrement
priority value on standby ACE.
Default 'peer priority' value on ft track-interface is 10.
If you configure 'peer priority 100' on ft track-interface mode and vlan 202
goes down, the priority on standby ACE becomes 0.
(default ft group peer priority 100 - ft track interface priority 100 = 0)
I recommend you configure peer priority as 11 or larger.
In general, these commands are used as below.
Finally, ACE doesn't support 'preempt delay' command.