Juniper SERVICE AVAILABILITY - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 61

Table 5: Application Support for Stateful SRP Switchover (continued)
Application Supported
DHCP Relay Server
DHCPv4 Local
Server
DHCPv6 Local
Server
L2TP
L2TP Dialout –
IPv4 Local Address
Pools
IPv6 Local Address
Pools
RADIUS Client
RADIUS
Dynamic-Request
Server
Chapter 3: Managing Stateful SRP Switchover
Unsupported Notes
– 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.
–
–
– The internal local address server state
supports only static recovery. However,
the AAA application reallocates active
addresses on a switchover. The resulting
effect is the IPv4 local address server
having full HA support.
– When the IPv6 local pools are
configured, you can perform an HA
switchover without cold booting the
router because the configuration is now
HA safe. The prefix assigned to the
subscriber, before and after the warm
restart, remains the same. The In Use
prefix count also remains the same
before and after the warm restart.
– Similar to local address server, AAA
recovers disrupted RADIUS
communication on a switchover. The
resulting effect is the RADIUS client
having full HA support.
– Static recovery support only.
Application Support for Stateful SRP Switchover
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