Src Software And Sdx Software; Ssh; Stateful Srp Switchover (High Availability) - Juniper JUNOSE 11.0.2 - RELEASE NOTES Release Note

SRC Software and SDX Software

SSH

Stateful SRP Switchover (High Availability)

NOTE:
all subscribers to drop, because many of the dropped subscribers will immediately
attempt to reconnect. This type of outage occurs far less frequently with stateful
SRP switchover.
The SRC client does not prevent you from changing the name of the router
while the client is connected to the SAE, resulting in SAE issues such as lost IP
addresses and stale users. [Defect ID 77102]
Work-around: To change the router name while the SRC client is connected to
the SAE, shut down the SRC client, change the name, then re-enable the SRC
client.
If the SRP module restarts when SSH is configured in a VR other than default,
SSH can sometimes become disabled. This happens if SSH attempts to bind
with a VR before the VR comes back up after the restart. In this event, a
warning message is generated to alert you to the fact that SSH is disabled in
that VR. You must manually re-enable SSH either by accessing the console VTY
or creating a Telnet session to the router.
When IP tunnels are configured on a router enabled for stateful SRP
switchover, and the Service Module (SM) carrying these tunnels is reloaded,
stateful SRP switchover transitions to the pending state. Stateful SRP
switchover remains in the pending state for 10 minutes following the
successful reloading of the SM. This amount of time allows for IP tunnel
relocation and for the tunnels to become operational again on the SM. If an SRP
switchover occurs while in the pending state, the router performs a cold restart.
Work-around: None.
Additional processing is required to maintain and mirror the necessary state
information that enables subscriber sessions to stay up across an SRP failover.
As a result, the performance of other control plane functions is reduced.
Specifically, call setup rates are lower than in previous releases.
Rapid call setup rates are most important following an outage that causes
We have ongoing development activities to characterize and improve call setup
rates in future releases.
Stateful SRP switchover remains inactive for 20 minutes after an initial
cold-start or cold-restart of the router. This delay enables the system to reach a
stable configuration before starting stateful SRP switchover.
If you want to override the 20-minute timer, turn high availability off by using
the mode file-system-synchronization command, and then on again by using
the mode high-availability command.
Release 11.0.2
35
Known Behavior