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TA 850 User Manual © 2001, ADTRAN, Inc.
61200375L1-1
TA 850
T1 RCU VoATM UIG/61200376L2-31A
Page 36 of 72
UDP Relay
This menu configures the 850 to act as a UDP relay agent for applications requiring a response from
UDP hosts that are not on the same network segment as their clients.
Mode
When this option is set to
ON
(def), the TA 850 will act as a relay agent.
UDP Relay List
Up to four relay destination servers can be specified in this list.
Bridge
The B
RIDGE
menu is used to set up the bridge parameters for the 850. The bridging function runs at the
Media Access Control (MAC) level which allows any protocol packets that run over Ethernet to be for-
warded. Bridging can run concurrently with IP. However, when IP routing is active, IP packets (which
include ARP packets) are not bridged.
Mode
This is used to enable the bridge function.
Address Table
The 850 automatically maintains a table of MAC addresses detected and associates those addresses with
the LAN or WAN port from which they were received.
R
ELAY
A
DDRESS
This is the IP address of the server that will re-
ceive the relay packet.
UDP P
ORT
T
YPE
STANDARD (def)
The following standard UDP protocols are
relayed when set: DHCP, TFTP, DNS, NTP
(Network Time Protocol, port 123, NBNS
(NetBios Name Server, port 137), NBDG
(NetBIOS Datagram, port 138), and BootP.
S
PECIFIED
When set, the UDP port (1 to 65535) can be
specified in the UDP Port columns (up to
three per server).
UDP P
ORT
1, 2, 3
Used for specifying UDP ports to be relayed.
These fields only apply when
UDP P
ORT
T
YPE
is
set to
S
PECIFIED
.
A
GING
The maximum time an idle MACaddress remains in
the table before being removed. The value is in min-
utes.
F
ORWARD
P
OLICY
When this parameter is set to U
NKNOWN
(def), any
bridge packet with a destination MAC address that
is not in the bridge table is forwarded to all other
ports. When set to K
NOWN
, the packet with the un-
known destination MAC address is dropped and is
not forwarded.