James Carlson wrote: > Kyle McDonald writes: > >> 48ea4f19: Datagram received on network device: mgmt0(limited broadcast) >> 48ea4f19: Malformed ICMP message received from host 172.30.171.103: len >> 84 != 64 >> > > This part means that we received a packet that was 84 bytes long (as > reported by recvfrom) and that had an IP length of 64. I think the > DHCP server is wrong here; that shouldn't be treated as an error. > > If the IP length is greater than the received length, then the packet > has been truncated, and something's probably wrong. But if it's less, > then that just means there's some padding we should have ignored. > > Ok. >> 48ea4f19: ICMP ECHO reply to OFFER candidate: 172.30.171.103, disabling. >> > > Find that guy. Someone is reponding to the address that should not > currently be in use, because the lease is not valid. > > That's the thing, the only machine on this network with that address is the machine trying to renew that address.
It's had that address for a while, and renewed it before. During a renew, shouldn't the current address holder respond to the ping from the dhcp server? >> The client that is trying to renew it's address is an RHEL4u7 machine. >> This is the second time this address has been makred unusable, and the >> machine has been given an address it's not supposed to use. The DHCP >> server is configured to only give one particular IP address to each MAC >> address. >> > > At a guess, the RHEL4u7 machine is responding to an ICMP ECHO message, > even though it doesn't have a current lease for that address. > > I thikn it does have a lease, That's the address it's trying to renew anyway. > If that's a correct guess (a long-term snoop showing correct lease > acquisition and eventual failure could provide more clues), then > that's an error on their part. You can probably work around by > specifying the ICMP_VERIFY=FALSE option in /etc/inet/dhcpsvc.conf. > > I'll try to get the snoop and see what it shows. Thanks. -Kyle _______________________________________________ networking-discuss mailing list [email protected]
