Avaya Nortel Communication Server 1000 Manual page 294

294 Configuration of IP Telephony nodes using Element Manager
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Copyright © 2003–2008, Nortel Networks
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Figure 68
Embedded LAN (ELAN) Routes
In the Routes section, enter the IP address and Subnet mask for
any host that is not on the ELAN subnet but requires access to
the Voice Gateway Media Card across the ELAN subnet. A Telnet
session for maintenance from a remote PC is an example of when
this would be needed. The address of the remote PC would be
added in the Route list.
The default route on the card causes packets destined for unknown
subnets to be sent out on the TLAN network interface. Packets
from an external host arrive on the ELAN network interface and
responses are sent on the TLAN network interface. This process
can cause one-way communication if the TLAN subnet is not routed
to the ELAN subnet. It is necessary to add an entry in the Route list
to correct the routing so that response packets are sent on the ELAN
subnet. Each entry creates a route entry in the card route table that
directs packets out the ELAN network interface. See
"Specifying additional ELAN routes" (page
CAUTION
Use caution when assigning card routing table entries. Do
not include the IP address of an IP Phone. Otherwise,
voice traffic to these IP Phones is incorrectly routed
through the ELAN subnet and ELAN subnet gateway. To
avoid including the wrong IP address, Nortel recommends
that Host IDs are defined for the card routing table entries.
To add additional routes, click the Add button again and enter the
route information. Repeat this step for each route to be added.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Figure 69
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