Client Assigned Ip Address But No Binding Entry Created; Client Not Always Successfully Assigned An Ip Address - Avaya 8800 Troubleshooting Manual

1. Enable trace:
2. Verify the trace shows the switch received the DHCP Discover request from the
3. Verify the trace shows the switch received the DHCP Offer response from the
4. Verify the trace shows the switch received the DHCP Request from the client.
5. Verify the trace shows the switch received the DHCP ACK response from the

Client assigned IP address but no binding entry created

If the client is assigned an IP address, but no associated binding entry is created, DHCP
Snooping may not be configured properly for Layer 3.
1. Verify ALL VLANS on the core side have DHCP Snooping enabled.
2. Verify ALL core side ports are trusted.

Client not always successfully assigned an IP address.

If the client is not always successfully assigned an IP address, DHCP Snooping may not be
configured properly.
Verify that the client is NOT provisioned on an access side untrusted MLT port.
Untrusted ports cannot be members of an MLT; however, there is no semantic check
to protect against such a configuration.
show mlt info show ip dhcp-snooping port (CLI)
Troubleshooting
trace level 116 4 trace screen on (CLI or ACLI)
client.
server.
client.
show ip dhcp-snooping vlan (CLI)
show ip dhcp snooping vlan (ACLI)
Note that this additional provisioning differs from other vendors. When enabling
DHCP Snooping for Layer 3, both the access side and core side VLANs MUST have
DHCP Snooping enabled.
show ip dhcp-snooping port (CLI)
show ip dhcp snooping interface (ACLI)
Troubleshooting DHCP Snooping
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