Information Technology Reference
In-Depth Information
Table17-1
Modem Cannot Send or Receive Data (continued)
Possible Causes
Suggested Actions
Hardware flow
control is not
configured on the
local or remote
modem or router
(continued)
Example:
The following example sets hardware flow control on line 7:
line 7
flowcontrol hardware
Note: If you cannot use flow control for some reason, limit the
line speed to 9600 bps. Faster speeds likely will result in lost
data.
After enabling hardware flow control on the access server or
router line, initiate a reverse Telnet session to the modem via
that line. For more information, see the section
“Establishing a Reverse Telnet Session to a Modem.”
3.
Use a modem command string that includes the RTS/CTS
Flow command for your modem. This command ensures
that the modem is using the same method of flow control
(that is, hardware flow control) as the Cisco access server or
router. See your modem documentation for exact
configuration command syntax.
4.
dialer map
commands are
misconfigured
1. Use the show running-config privileged exec command to
view the router configuration. Check the dialer map
command entries to see whether the broadcast keyword is
specified.
2. If the keyword is missing, add it to the configuration.
Syntax:
dialer map protocol next-hop-address [ name hostname ]
[ broadcast ] [ dial-string ]
Syntax description:
protocol —The protocol subject to mapping. Options
include IP, IPX 1 , bridge, and snapshot.
next-hop-address —The protocol address of the opposite
site's async interface.
name hostname —A required parameter used in PPP
authentication. It is the name of the remote site for which
the dialer map is created. The name is case-sensitive and
must match the host name of the remote router.
broadcast —An optional keyword that broadcast packets
(such as IP RIP or IPX RIP/SAP updates) to be forwarded
to the remote destination. In static routing sample
configurations, routing updates are not desired and the
broadcast keyword is omitted.
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