Avaya Troubleshooting Routers Průvodce řešením problémů stáhnout pdf (Strana 104)

Troubleshooting Routers

5-26

308656-14.00 Rev 00

Troubleshooting a Synchronous to X.21 Connection

If you connect a Nortel Networks router running Series 7 or Series 8 software to a

device with an X.21 interface, do the following:

Set the appropriate Com port configuration jumpers on the Ethernet link

module to the X.21 setting.

See Installing and Maintaining BN Routers for instructions.

Enter the following command:

get wfSyncEntry.76.*

Make sure that you set the synchronous polling in the router’s

synchronous line driver configuration to 2 (disabled), which is the

default.

If you set synchronous polling to 1 (enabled) and the data set ready (DSR)

lead is dropped, the software disables the synchronous driver. When you set it

to 2, the software disregards the DSR lead.

Reception Errors Incrementing or Reception Count Not Incrementing

Conduct a local loopback test of the local channel service unit (CSU) or digital

service unit (DSU). During the loopback test, check the transmission and

reception statistics.

If transmission and reception statistics increment equally without errors, conduct

a loopback test of the remote CSU/DSU if at least one of the following is true:

• You configured the synchronous line as standard with explicit addressing.

• You configured the data terminal equipment/data communications equipment

(DTE/DCE) with promiscuous mode turned on.

The remote loopback test allows data to leave the router, cross the synchronous

circuit to the remote CSU/DSU, and return to the router.

If the transmission and reception statistics increment without errors, perform the

local and remote loopback tests on the remote side.

Caution:

Do not do loopback testing on a synchronous port during network

production time if the bridge is operating on that port.

1 2 ... 99 100 101 102 103 104 105 106 107 108 109 ... 267 268

Žádné komentáře

Avaya Troubleshooting Routers Průvodce řešením problémů Strana 104