JunosE 11.0.2 Release Notes
36
Known Behavior
After a stateful SRP switchover, each layer of the interface columns must
reconstruct its interfaces from the mirrored information. While the interfaces
are being reconstructed the SRP module cannot send or receive frames,
including the protocol frames that signal graceful restart behavior with OSPF
and IS-IS peers. If the configured hold time is too short, peers might mistakenly
declare the adjacency down during the time in which the graceful restart is
taking place. [Defect ID 65132]
Work-around
: Increase the hold time to provide sufficient time for interface
synchronization before the peers declare the adjacency down.
For OSPF, use the
ip ospf dead-interval
command to set the hold time.
We recommend that you use Bidirectional Forwarding Detection (BFD)
with a longer OSPF dead interval to achieve fast failure detection.
For IS-IS, use the
isis hello-interval
and
isis hello-multiplier
commands
to set the hold time.
We recommend the following hold times for each protocol, based on the
number of interfaces.
When you issue
show
commands as soon as the CLI is available after a stateful
SRP switchover, the commands can hang until the warm restart is completed.
[Defect ID 85306]
Subscriber Interfaces
MAC address validation is not supported on either of the following:
Packet-triggered subscriber interfaces that are created dynamically
Packet-triggered subscriber interfaces that are managed on the primary IP
interface
A packet-triggered subscriber interface is created when the router receives a
packet with an IP source address that does not match any entries in the
demultiplexer table. When the router detects an unmatched packet, it
generates a trigger event that determines whether to create a dynamic
subscriber interface or configure an existing interface. To configure packet
detection on the router, use the
ip auto-detect ip-subscriber
command.
Interface Count
Recommended Hold Time
for OSPF
Recommended Hold Time
for IS-IS
16000 or less
80 seconds
50 seconds
16001 to 32000
87 seconds
55 seconds
32001 to 48000
90 seconds
70 seconds
