Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual page 71

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Table 8: Application Support for Stateful SRP Switchover (continued)
Application Supported
Remote Access
AAA
DHCP External
Server and Packet
Trigger
DHCP Packet
Capture
DHCP Proxy Client –
DHCP Relay Proxy
DHCP Relay Server
DHCPv4 Local
Server
DHCPv6 Local
Server
L2TP
L2TP Dialout –
Chapter 3: Managing Stateful SRP Switchover
Unsupported Notes
– –
– Following a switchover, the DHCP lease
(that is, time remaining) is recalculated
based on when the lease started. When
the release timer for a client expires, the
client is deleted and the access route is
removed, along with the dynamic
subscriber interface if it was created. If
the client requests a new lease, DHCP
external server resynchronizes with the
new lease time.
– –
–
– –
– Before HA support, clients identified by
the DHCP relay server were maintained
on a switchover (their state was stored
to NVS); DHCP relay server always had
some level of HA support.
Currently, following a switchover, the
DHCP lease (that is, time remaining) is
reset. When the release timer for a client
expires, the client requests a new lease.
The E Series router DHCP relay server
then synchronizes with the new state.
– –
– DHCPv6 now supports stateful SRP
switchover (high availability).
After SRP warm switchover, the router
restores the client bindings from the
mirrored DHCPv6 information as it does
for other applications that support
stateful SRP switchover.
– —
–
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