Carrier Access CMG Router - Manual (Page 270)

C-4 CMG Router - Release 2.7
Troubleshooting
LAN Related Issues
Unable to access the Local (LAN) Router unit via Telnet
First, verify that the local Router was given an IP Address that is on the same network
as the workstation. Since Telnet uses the IP protocol, establish that IP is functioning
correctly by “pinging” the local unit from the workstation or by pinging the workstation
from the local unit. Pinging will verify that there is communication between the
workstation and the Router. Since you are unable to Telnet into the local unit, you will
need to connect the local unit to a workstation using the Async port. Once you are
connected to the local unit, refer to Chapter 7, Ping Utility. The inability to ping from
one device to the other indicates a problem with IP or possibly the Telnet software.
Refer to your Telnet documentation for more information.
Unable to access a remote unit via Telnet
Refer to the instructions given above in Unable to access the local unit via Telnet. In
addition, make sure that the workstation trying to Telnet, as well as the IP and ARP
packets are authorized to communicate across the WAN. Review the FORWARD
MODE field setting as well as the enabled filters on both the local and remote units to
verify that they are set up to communicate (refer to Chapter 3, Configuration - Profile
Directory - Chapter 4, LAN (Local) Profile Setup and Chapter 5, Remote (WAN)
Profile. Also, if the remote network is different, define the local unit’s IP Address as
the default route for the workstation and make sure that there is a remote route to the
remote’s network in the Network/Server table.
Be aware that if you establish a firewall filter and do not expressly permit Telnetting
into this unit, you will be denied access.