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RADIUS Virtual Circuit (VC) Logging allows the Cisco IOS XE to accurately record the virtual path interface (VPI) and virtual circuit interface (VCI) of an incoming subscriber session.
With RADIUS VC Logging enabled, the RADIUS network access server (NAS)-port field is extended and modified to carry VPI/VCI information. This information is logged in the RADIUS accounting record that was created at session startup.
For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for RADIUS VC Logging" section.
Use Cisco Feature Navigator to find information about platform support and Cisco IOS XE software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
•How to Configure RADIUS VC logging
•Configuration Examples for RADIUS VC Logging
•Feature Information for RADIUS VC Logging
This section contains the following configuration tasks:
•Configuring the NME Interface IP Address on the NSP
•Configuring the NME IP address
•Configuring RADIUS VC Logging on the NRP
•Verifying the NME Interface IP Address
•Verifying RADIUS VC Logging on the NRP
The NAS-IP-Address field in the RADIUS accounting packet contains the IP address of the Network Management Ethernet (NME) port on the Network Service provider (NSP), even if the NME is shut down. If your Network Route Processor (NRP) does not use a DHCP server to obtain an IP address, you must configure a static IP address. Perform the following steps to configure a static combined NME IP address.
1. enable
2. configure terminal
3. interface BVI bridge-group
4. ip address address subnet
5. exit
You can use the Gigabit Ethernet port as a separate NME interface instead of the combined NME interface. Perform the following steps to configure the NME IP address.
1. enable
2. configure terminal
3. interface GigabitEthernet number
4. exit
Perform the following steps to configure RADIUS VC logging.
1. enable
2. configure terminal
3. radius-server attribute nas-port format d
4. ip address address mask
5. exit
To verify the NME IP address, enter the show interface bvi1 or show interface e0/0/0 EXEC command on the NSP. Check the Internet address statement (indicated with an arrow).
Router# show interface bvi1
BVI1 is up, line protocol is up
Hardware is BVI, address is 0010.7ba9.c783 (bia 0000.0000.0000)
MTU 1500 bytes, BW 10000 Kbit, DLY 5000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type:ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy:fifo
Output queue 0/0, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1540 packets input, 302775 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
545 packets output, 35694 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
To verify RADIUS VC logging on the RADIUS server, examine a RADIUS accounting packet. If RADIUS VC logging is enabled on the Cisco IOS XE software, the RADIUS accounting packet will appear similar to the following example:
Wed Jun 16 13:57:31 1999
NAS-IP-Address = 192.168.100.192
NAS-Port = 268566560
NAS-Port-Type = Virtual
User-Name = "cisco"
Acct-Status-Type = Start
Service-Type = Framed
Acct-Session-Id = "1/0/0/2.32_00000009"
Framed-Protocol = PPP
Framed-IP-Address = 172.16.7.254
Acct-Delay-Time = 0
The NAS-Port field shows that RADIUS VC logging is enabled. If this line does not appear in the display, then RADIUS VC logging is not enabled on the Cisco IOS XE software.
The Acct-Session-Id field should also identify the incoming NSP interface and VPI/VCI information, in this format:
Acct-Session-Id = "slot/subslot/port/VPI.VCI_acct-session-id"
This section provides the following configuration examples:
•Example: Configuring the NME Interface IP Address on the NSP
•Example: Configuring the NME IP address
•Example: Configuring RADIUS VC Logging on the NRP
The following example shows how to configure a static IP and subnetwork address for the Bridge-Group Virtual Interface:
Router> enable
Router# configure terminal
Router(config)# interface BVI1
ip address 209.165.200.225 255.255.255.224
Router(config)# exit
The following example shows how to configure the GigabitEthernet interface:
Router> enable
Router# configure terminal
Router(config)# interface GigabitEthernet 0/0/0
Router(config-if)# ip address 209.165.200.225 255.255.255.224
Router(config)# exit
The following example shows how to configure the RADIUS VC logging on the NRP:
Router> enable
Router# configure terminal
Router(config)# radius-server attribute nas-port format d
Router(config)# exit
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To locate and download MIBs for selected platforms, Cisco IOS XE software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
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Table 1 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 1 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.