Hello, We have a small site we inherited that is still on ADSL on legacy sprint in the northeast. The ILEC is using aal5snap and we have a WIC-1ADSL with a physical ATM interface thats bridged to BVI1, and we get a dynamic WAN ip from the ILEC via DHCP on BVI1.
the ADSL part of our config looks like this: *bridge irb* *!* *interface ATM0/0* * description DSL Layer2* * no ip address* * atm restart timer 300* * no atm ilmi-keepalive* * dsl operating-mode auto * * clock rate aal5 7000000* * clock rate aal2 7000000* * bridge-group 1* * bridge-group 1 spanning-disabled* * hold-queue 224 in* * pvc 8/35 * * encapsulation aal5snap* * !* *!* *interface BVI1* * ip address dhcp* * ip nat outside* I was looking internet into a report of weird internet issues and I found the arp table for BVI1 is full (several pages) of lots of random internet IP's with the same MAC address which isnt local to the router: *Protocol Address Age (min) Hardware Addr Type Interface* *Internet 17.110.228.155 26 0030.881b.f475 ARPA BVI1* *Internet 8.8.8.8 162 0030.881b.f475 ARPA BVI1* *Internet 23.3.13.24 25 0030.881b.f475 ARPA BVI1* *Internet 17.110.228.154 84 0030.881b.f475 ARPA BVI1* *Internet 74.209.254.102 24 0030.881b.f475 ARPA BVI1* *Internet 74.125.228.215 29 0030.881b.f475 ARPA BVI1* *Internet 173.194.121.18 29 0030.881b.f475 ARPA BVI1* *Internet 17.110.228.159 84 0030.881b.f475 ARPA BVI1* *Internet 69.172.216.55 24 0030.881b.f475 ARPA BVI1* *Internet 4.2.2.2 162 0030.881b.f475 ARPA BVI1* *Internet 31.13.69.80 25 0030.881b.f475 ARPA BVI1* *Internet 173.194.121.17 26 0030.881b.f475 ARPA BVI1* *Internet 17.110.224.152 36 0030.881b.f475 ARPA BVI1* *Internet 66.196.81.223 2 0030.881b.f475 ARPA BVI1* *Internet 74.125.228.219 21 0030.881b.f475 ARPA BVI1* *Internet 17.167.146.44 22 0030.881b.f475 ARPA BVI1* *Internet 173.194.121.30 26 0030.881b.f475 ARPA BVI1* *Internet 17.172.239.90 35 0030.881b.f475 ARPA BVI1* *Internet 74.122.189.133 97 0030.881b.f475 ARPA BVI1* *Internet 173.252.79.23 49 0030.881b.f475 ARPA BVI1* *Internet 17.173.255.74 144 0030.881b.f475 ARPA BVI1* Interestingly enough when I look up the OUI of that MAC I see Sierra Systems aka Redback which I happen to know is the DSLAM that the ILEC is using. Anyone seen anything like this? I am trying to figure out if its an issue with the bridging on the local router or telco misconfiguration. I rarely touch any ATM anymore so I'm scratching my head here but hoping something obvious might stand out to someone. TIA, chris _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
