configuration for the destination UDP port. If so, the relay agent unicasts the
packet to the configured server IP addresses. Otherwise the packet is not
If the packet matches a discard relay entry on the ingress interface, the
packet is not forwarded, regardless of the global configuration.
The relay agent relays packets that meet only the following conditions:
The destination MAC address must be the all-ones broadcast address
The destination IP address must be the limited broadcast address
(255.255.255.255) or a directed broadcast address for the receive interface.
The IP time-to-live (TTL) must be greater than 1.
The protocol field in the IP header must be UDP (17).
The destination UDP port must match a configured relay entry.
Configuring L2 and L3 Relay Features