Hi all

We have a mixture of BNGs,  ASR9k and ASR1k that use Freeradius for AAA.

One of the differences between the models is the format for the unnumbered 
loopback attribute that comes from Freeradius

For the ASR9k format is "ip:ipv4-unnumbered=Loopback2000"
For the ASR1k format is "ip:ip-unnumbered=Loopback2000"

Does anyone see a problem with sending both via AV pairs when user logs in ?

The taught process being the ASR9k will ignore the ip:ip-unnumbered and process 
the ip:ipv4-unnumbered and with the ASR1k vise versa

E.g. from debug radius on asr1k
Jan 24 09:10:30.784 NZDT: RADIUS:   Cisco AVpair       [1]   31  
"ip:ip-unnumbered=Loopback2000"
Jan 24 09:10:30.784 NZDT: RADIUS:  Vendor, Cisco       [26]  39
Jan 24 09:10:30.784 NZDT: RADIUS:   Cisco AVpair       [1]   33  
"ip:ipv4-unnumbered=Loopback2000"
Jan 24 09:10:30.784 NZDT: RADIUS(00000077): Received from id 1645/3
Jan 24 09:10:30.784 NZDT: RADIUS/DECODE: parse unknown cisco vsa 
"ipv4-unnumbered" - IGNORE

The attributes are part of radgroupreply.

Under normal operations users will be authenticating against their local BNG 
but in a failure situation we would Psuedowire the customers off to the next 
closest BNG which may be a different model.  If this were to occur I'm trying 
to avoid having to update radius for those users (so they get the correct 
attribute)

Or am I looking at this this wrong way and there is a much easier way ?

Cheers

Bryan

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