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GTPv2 Support in the iWAG
RADIUS Configuration
The following configurations are required on the RADIUS server to differentiate between a GTPv1 subscriber
and a GTPv2 subscriber:
subscriber-profile profile1 { # this is a GTPv2 profile
access-accept {
reply-msg "Default profile"
cisco-avpair { "cisco-mn-service=ipv4" }
cisco-avpair { "cisco-mpc-protocol-interface=gtpv2" }
cisco-avpair { "cisco-service-selection=example.com" }
cisco-avpair { "cisco-msisdn=4910000000" }
3gpp {
imsi 406091000000000
}
}
}
subscriber-profile profile2 { # this is a GTPv1 profile
access-accept {
reply-msg "Default profile"
cisco-avpair { "cisco-mn-service=ipv4" }
cisco-avpair { "cisco-mpc-protocol-interface=gtpv1" }
cisco-avpair { "cisco-service-selection=example.com" }
cisco-avpair { "cisco-msisdn=4900000000" }
3gpp {
imsi 406090000000000
}
}
}
sub-grp-mgr sub-grp1 {
control-by round-robin
group-profiles {
subscriber-profile profile1 profile-priority 99
subscriber-profile profile2 profile-priority 98
}
}
Intra-iWAG Roaming
Effective from Cisco IOS XE Release 3.10S, both GTPv1 and GTPv2 support connected subscriber roaming
across different access interfaces of the iWAG. GTPv1 and GTPv2 preserve and update their existing sessions
to allow their data traffic to flow through the new ingress interfaces from the access network.
Configuration for the GTPv1 and GTPv2 Roaming Scenario
The initiator unclassified mac-address command must be configured on every iWAG access interface to
support subscriber roaming between these interfaces. As shown in the following configuration, all the access
interfaces must be specified under the GTP configuration before bringing up the IP subscriber sessions. If the
access interface is not specified under the GTP, a subscriber's roaming option is not enabled for that interface.
Also, adding interfaces under the GTP after the sessions bring up fails subscriber roaming.
The following example shows the configuration for GTPv1 and GTPv2 roaming scenario:
interface GigabitEthernet0/0/2
description To client facing interface
ip address 192.1.1.1 255.255.0.0
negotiation auto
service-policy type control ISG_GTP_CONTROL
ip subscriber l2-connected
OL-30226-03
Intelligent Wireless Access Gateway Configuration Guide
RADIUS Configuration
53
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