Cisco IOS XE Intelligent Services

Configuring ISG Access for IP Subscriber Sessions
How to Configure ISG for IP Subscriber Sessions
16
DETAILED STEPS
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
interface type number
Example:
Router(config)# interface gigabitethernet 0/0/0
Specifies an interface and enters interface configuration
mode.
Step 4
ip subscriber l2-connected
Example:
Router(config-if)# ip subscriber l2-connected
Specifies the type of IP subscriber to be hosted on the
interface, and enters ISG IP subscriber configuration mode.
Note It is recommended that IP sessions for Layer 2
connected subscribers be configured using the ip
subscriber l2-connected command. However, the
ip subscriber routed command could also be used
if subscriber IP addresses are routable in the access
domain.
Step 5
initiator {dhcp [class-aware] | radius-proxy |
unclassified mac-address}
Example:
Router(config-subscriber)# initiator
unclassified mac-address
Configures ISG to create an IP subscriber session upon
receipt of the specified packet type.
• dhcp—ISG initiates an IP session upon receipt of a
DHCP DISCOVER packet. The class-aware keyword
allows ISG to influence the IP address assigned by
DHCP by providing DHCP with a class name.
• radius-proxy—ISG initiates an IP session upon receipt
of a RADIUS packet.
• unclassified mac-address—ISG will initiate an IP
session upon receipt of the first IP packet with an
unclassified MAC source address.
• This command can be entered more than once to
specify more than one method of IP session initiation.
Note If the ISG device serves as either a DHCP relay or
DHCP server in the assignment of client IP
addresses, ISG must be configured to initiate IP
sessions upon receipt of DHCP DISCOVER
packets. In other words, the initiator dhcp
command must be configured instead of the
initiator unclassified ip or initiator unclassified
mac command.