ICMP traffic fails to single IP on subnet due to proxy ARP
Applies to
Issue
- Switch is responding to ARP request with MAC of switch.
- ICMP requests destined for MAC of switch are not responded to.
No. Time Source Destination Protocol Info
12 37.590156 d2:39:ea:xx:xx:d4 Broadcast ARP 42 Who has 10.10.10.35? Tell 10.10.10.3
Frame 12: 42 bytes on wire (336 bits), 42 bytes captured (336 bits)
Ethernet II, Src: d2:39:ea:xx:xx:d4 (d2:39:ea:xx:xx:d4), Dst: Broadcast (ff:ff:ff:ff:ff:ff)
Address Resolution Protocol (request)
No. Time Source Destination Protocol Info
13 37.590635 d2:39:ea:xx:xx:5a d2:39:ea:xx:xx:d4 ARP 56 10.10.10.35 is at d2:39:ea:xx:xx:5a
Frame 13: 56 bytes on wire (448 bits), 56 bytes captured (448 bits)
Ethernet II, Src: d2:39:ea:xx:xx:5a (d2:39:ea:xx:xx:5a), Dst: d2:39:ea:xx:xx:d4 (d2:39:ea:xx:xx:d4)
Address Resolution Protocol (reply)
No. Time Source Destination Protocol Info
15 37.591002 xx:xx:xx:xx:xx:34 d2:39:ea:xx:xx:d4 ARP 60 10.10.10.35 is at xx:xx:xx:xx:xx:34
Frame 15: 60 bytes on wire (480 bits), 60 bytes captured (480 bits)
Ethernet II, Src: xx:xx:xx:xx:xx:34 (xx:xx:xx:xx:xx:34), Dst: d2:39:ea:xx:xx:d4 (d2:39:ea:xx:xx:d4)
Address Resolution Protocol (reply)
[Duplicate IP address detected for 10.10.10.35 (xx:xx:xx:xx:xx:34) - also in use by d2:39:ea:xx:xx:5a (frame 13)]
No. Time Source Destination Protocol Info
17 37.599052 xx:xx:xx:xx:xx:34 d2:39:ea:xx:xx:d4 ARP 60 10.10.10.35 is at xx:xx:xx:xx:xx:34
Frame 17: 60 bytes on wire (480 bits), 60 bytes captured (480 bits)
Ethernet II, Src: xx:xx:xx:xx:xx:34 (xx:xx:xx:xx:xx:34), Dst: d2:39:ea:xx:xx:d4 (d2:39:ea:xx:xx:d4)
Address Resolution Protocol (reply)
[Duplicate IP address detected for 10.10.10.35 (xx:xx:xx:xx:xx:34) - also in use by d2:39:ea:xx:xx:5a (frame 13)]
