This seemed strange to me. I transitioned management on this 3750 yesterday from vlan 1 to 4000. I simply shutdown vlan 1 and left old IP address on vlan 1 interface. This seems to have caused a problem later on. Yesterday, I was able to manage the 3750 fine over vlan 4000 svi, but last night 3750 rebooted during a power outage (I'm not so sure that the reboot had much to do with it other than a clearing of arp caches and revealing a strange behavior, but I'm not sure). When I came in this morning I couldn't get into 3750. I found a strange arp entry pointing to the def gw 10.101.7.1 out "vlan 1 pv 4000".. What in the world is that?! it wasn't able to get it to work correctly until I removed the ip address off of vlan 1 (but vlan 1 svi was shutdown the whole time), then things were restored. Anyone know anything about this?
3750#sh ip arp vl 1 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.1 1 c062.6bb0.7fad ARPA Vlan1 pv 4000 3750#sh ip arp vl 4000 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.8 - e840.40ce.65c1 ARPA Vlan4000 Internet 10.101.7.10 0 34db.fd1a.a840 ARPA Vlan4000 3750#cle arp int vl 1 3750#cle arp int vlan 4000 3750#sh ip arp vl 4000 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.8 - e840.40ce.65c1 ARPA Vlan4000 Internet 10.101.7.10 0 34db.fd1a.a840 ARPA Vlan4000 3750#sh ip arp vl 1 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.1 0 c062.6bb0.7fad ARPA Vlan1 pv 4000 3750#clear arp interface vl 1 3750#sh ip arp vl 1 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.1 0 c062.6bb0.7fad ARPA Vlan1 pv 4000 3750#sh ip arp vl 1 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.1 0 c062.6bb0.7fad ARPA Vlan1 pv 4000 3750#clear arp interface vlan 1 3750#clear arp interface vlan 1 3750#clear arp interface vlan 1 3750#clear arp interface vlan 1 3750#clear arp interface vlan 1 **** IT WOULDN'T CLEAR **** 3750#sh ip arp vl 1 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.1 0 c062.6bb0.7fad ARPA Vlan1 pv 4000 3750#ib vl 1 Interface IP-Address OK? Method Status Protocol Vlan1 192.168.200.73 YES NVRAM administratively down down 3750#sh run in vl 1 Building configuration... Current configuration : 74 bytes ! interface Vlan1 ip address 192.168.200.73 255.255.255.0 shutdown end 3750#conf t Enter configuration commands, one per line. End with CNTL/Z. 3750(config)#int vl 1 3750(config-if)#no ip address **** RIGHT THEN PINGS CAME BACK FOR THIS 3750, apparently having that old ip address still on vlan 1 was breaking things **** 3750(config-if)#^Z 3750#sh run in vl 1 Building configuration... Current configuration : 48 bytes ! interface Vlan1 no ip address shutdown end 3750#sh ip arp vl 1 3750#sh ip arp vl 4000 Protocol Address Age (min) Hardware Addr Type Interface Internet 10.101.7.8 - e840.40ce.65c1 ARPA Vlan4000 Internet 10.101.7.10 1 34db.fd1a.a840 ARPA Vlan4000 Internet 10.101.7.1 0 c062.6bb0.7fad ARPA Vlan4000 3750#wr Building configuration... [OK] Model number : WS-C3750G-24TS-S1U Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1) Aaron _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/