Alcatel-Lucent 7750 SR OS - Page 864

VPRN Features
Page 864 7750 SR OS Services Guide
Becoming Backup
(redundant IP inter-
face not available)
• Will respond to
ARP for all owned
subscriber subnet
IP addresses
(hardware address
and source MAC =
group IP interface
native MAC).
• Will not respond to
ARP for subscriber
subnet SRRP
gateway IP
addresses.
• Will not respond to
ARP for any
subscriber hosts on
the subscriber
subnet.
• Will not respond to
ARP for any
remote IP hosts.
• Will route out the
group IP interface
for subscriber hosts
associated with the
subscriber subnet
using the group IP
interface native
MAC address.
• Subscriber hosts
mapped to the
redundant IP
interface are
remapped to the
group IP interface.
• Will accept packets
destined to the
SRRP gateway
MAC received on
the group IP
interface
Backup (redundant IP
interface operational)
• Will respond to
ARP for all owned
subscriber subnet
IP addresses
(hardware address
and source MAC =
group IP interface
native MAC).
• Will not respond to
ARP for subscriber
subnet SRRP
gateway IP
addresses.
• Will not respond to
ARP for any
subscriber hosts on
the subscriber
subnet
• Will not respond to
ARP for any
remote IP hosts
• Will not route out
the group IP
interface for
subscriber hosts
associated with the
subscriber subnet.
• Subscriber hosts
mapped to the
group IP interface
are remapped to the
redundant IP
interface.
• Will not accept
packets destined to
the SRRP gateway
MAC received on
the group IP
interface.
Table 1: SRRP State Effect on Subscriber Hosts Associated with Group IP Interface (Continued)
SRRP State ARP Local Proxy ARP
Enabled
Remote Proxy
ARP Enabled
Subscriber Host
Routing