Alcatel-Lucent 7750 SR Manual page 940

IES Interface Commands
all-ones — The all-ones keyword following the broadcast parameter specifies the broadcast address
host-ones — The host-ones keyword following the broadcast parameter specifies that the broadcast
address
Syntax [no] address {ip-address/mask | ip-address netmask} [gw-ip-address ip-address]
Context config>service>ies>sub-if
Description
This command configures the local subscriber subnets available on a subscriber IP interface. The
configured ip-address and mask define the address space associated with the subscriber subnet. Up to
16 IP subnets can be created on a single subscriber IP interface. Each subnet supports a locally owned
IP host address within the subnet that is not expected to appear on other routers that may be servicing
the same subscriber subnet. For redundancy purposes, the keyword gw-address defines a separate IP
address within the subnet for Subscriber Routed Redundancy Protocol (SRRP) routing. This IP
address must be the same on the local and remote routers participating in a common SRRP instance.
In SRRP, a single SRRP instance is tied to a group IP interface. The group IP interface is contained
directly within a subscriber IP interface context and thus directly associated with the subscriber
subnets on the subscriber IP interface. The SRRP instance is also indirectly associated with any
subscriber subnets tied to the subscriber interface through wholesale/retail VPRN configurations.
With the directly-associated and the indirectly-associated subscriber interface subnets, a single SRRP
instance can manage hundreds of SRRP gateway IP addresses. This automatic subnet association to
the SRRP instance is different from VRRP where the redundant IP address is defined within the
VRRP context.
Defining an SRRP gateway IP address on a subscriber subnet is not optional when the subnet is
associated with a group IP interface with SRRP enabled. Enabling SRRP (no shutdown) will fail if
one or more subscriber subnets do not have an SRRP gateway IP address defined. Creating a new
subscriber subnet without an SRRP gateway IP address defined will fail when the subscriber subnet is
associated with a group IP interface with an active SRRP instance. Once SRRP is enabled on a group
interface, the SRRP instance will manage the ARP response and routing behavior for all subscriber
hosts reachable through the group IP interface.
The no form of the command removes the address from a subscriber subnet. The address command
for the specific subscriber subnet must be executed without the gw-address parameter. To succeed,
all SRRP instances associated with the subscriber subnet must removed or shutdown.
Parameters ip-address/mask | ip-address netmask — Specifies the address space associated with the subscriber
Page 940
used by the IP interface for this IP address will be 255.255.255.255, also known as the local
broadcast.
address used by the IP interface for this IP address will be the subnet broadcast address. This is
an IP address that corresponds to the local subnet described by the ip-address and the mask-
length or mask with all the host bits set to binary one. This is the default broadcast address used
by an IP interface.
The broadcast parameter within the address command does not have a negate feature, which is
usually used to revert a parameter to the default value. To change the broadcast type to host-
ones after being changed to all-ones, the address command must be executed with the
broadcast parameter defined.
subnet
7750 SR OS Services Guide