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Note This command or some of its parameters might not function as expected in the LightStream 1010 ATM switch environment.
Use the mac-address interface configuration command to set the MAC layer address.
There is a known defect in earlier forms of this command of the Texas Instruments (TI) Token Ring MAC firmware. This implementation is used by Proteon, Apollo, and IBM RTs. A host using a MAC address whose first two bytes are zeros (such as a Cisco switch/bridge) do not properly communicate with hosts using that form of this command of TI firmware.
The first solution involves installing a static RIF entry for every faulty node with which the switch communicates. This might not be practical if there are a lot of faulty nodes. The second solution involves setting the MAC address of the Cisco Token Ring to a value that works around the problem.
This command forces the use of a different MAC address on the specified interface, which avoids the TI MAC firmware problem. It is up to the network administrator to ensure that no other host on the network is using that MAC address.
The following example sets the MAC layer address, where xx.xxxx is an appropriate second half of the MAC address to use.
To enter map-class configuration mode to define quality of service (QOS) parameters that are associated with a static map for an SVC, use the map-class global configuration command. The no form of this command deletes this class.
No QOS parameters are defined.
If the map class identified by class-name does not already exist, the switch creates a new one. In either case, this command specifies the map class to which subsequent encapsulation-specific commands apply. Configuration of a map class is allowed only if the subsystem corresponding to the encapsulation is linked.
It is up to the media-specific routing that uses a static map to ensure that the referenced class exists if parameters are required.
The following example establishes QOS parameters for map-class atmclass1.
To associate an ATM map list to an interface or subinterface for either a PVC or SVC, use the map-group interface configuration command. The no form of this command removes the reference to the map list.
No ATM map lists are associated.
More than one map-group can be configured for an interface.
In the following example, the map list named ATM is associated with the ATM interface.
To define an ATM map statement for either a PVC or SVC, use the map-list global configuration command. The no form of this command deletes this list and all associated map statements.
No map statements are defined.
This command only applies to the interfaces on the ASP card, Ethernet 2/0/0 or ATM 2/0/0, and is only relevant to terminating connections. To allow the switch to propagate routing updates and ARP requests, a static map that maps the protocol address and the ATM address of the next-hop ATM station must be configured. The switch supports a mapping scheme that identifies the ATM address of remote hosts or switches. This address can be specified either as a virtual channel identifier descriptor (vci) for a PVC or an NSAP address for an SVC.
The map-list command specifies the map list to which the subsequent map-list configuration commands apply. These map-list configuration commands identify destination addresses. One map list can contain multiple map entries. A map list can be referenced by more than one interface or subinterface.
In the following example for a PVC, to configure ATM static maps, a map list named ATM is followed by two map statements for protocol addresses being mapped.
In the following example for an SVC, a map list named ATM includes two map statements for protocol addresses being mapped.
To configure the maximum administrative weight percentage used to determine if an alternate route is acceptable, use the max-admin-weight-percentage ATM router PNNI configuration command. To remove the constraint on administrative weight for alternate routes, use the no form of this command.
Infinity (no constraint on administrative weight for alternate routes).
ATM router PNNI configuration.
This command increases network efficiency by preventing alternate routes that use too many network resources from being specified. The command provides a generalized form of a hop count limit.
This command only takes effect when background route computation is enabled.
The maximum acceptable administrative weight is equal to the specified percentage of the least administrative weight of any route to the destination (from the background routing tables). For example, if the least administrative weight to the destination is 5040 and the percentage is 300, the maximum acceptable administrative weight for the call is 5040x300/100 or 15120.
For more information refer, to the LightStream 1010 ATM Switch Configuration Guide.
The following script shows how to configure the max-admin-weight-percentage to 300 percent using the max-admin-weight-percentage ATM router PNNI configuration command.
administrative-weight
atm pnni admin-weight
show atm pnni bg-routes
show atm pnni node
To set the amount of time that the switch waits for CTS after raising DTR in response to RING, use the modem answer-timeout line configuration command. Use the no form of this command to revert the switch to the default value.
This command applies to the auxiliary port only. It is useful for modems that take a long time to synchronize to the appropriate line speed.
The following example sets the timeout interval to 20 seconds.
To support dial-in modems that use DTR to control the off-hook status of the modem, use the modem callin line configuration command. In response to RING, the modem raises the DTR signal, which answers the modem. At the end of the session, the switch lowers DTR, which disconnects the modem. The no form of this command disables this feature.
This command has no arguments or keywords.
This command applies to the auxiliary port only.
The following example causes the modem connected to the switch to raise DTR in response to RING.
To configure a line for reverse connections, use the modem callout line configuration command. The no form of this command disables this feature.
This command has no arguments or keywords.
This command applies to the auxiliary port only and supports ports connected to computers that are designed to be connected to modems.
The following example configures the line for reverse connections.
To configure a line to require a CTS signal, use the modem cts-required line configuration command. Use the no form of this command to disable this feature.
This command has no arguments or keywords.
This command applies to the auxiliary port only. It supports lines that either the user or the network can activate. It is useful for closing connections from a user's terminal when the terminal is turned off and for preventing disabled printers and other devices in a rotary group from being considered.
The following example configures a line to require a CTS signal.
To configure a line to leave DTR low unless the line has an active incoming connection or an EXEC process, use the modem dtr-active line configuration command. The no form of this command disables this feature.
This command has no arguments or keywords.
This command applies to the auxiliary port only. It can be useful if the line is connected to an external device (for example, a timesharing system) that needs to know whether a line is in active use. The modem dtr-active command is similar to the no modem line configuration command.
The following example illustrates how to configure the auxiliary port for low DTR.
To configure a line for both incoming and outgoing calls, use the modem inout line configuration command. The no form of this command disables this feature.
This command has no arguments or keywords.
This command applies to the auxiliary port only.
The following example illustrates how to configure the auxiliary port for both incoming and outgoing calls.
To adjust the maximum packet size or maximum transmission unit (MTU) size, use the mtu interface configuration command. Use the no form of this command to restore the MTU value to its original default value.
Table 11-1 lists default MTU values according to media type.
Table 11-1 Default Media MTU Values
| Media Type | Default MTU |
|---|---|
This command only applies to the ASP interface card: Ethernet 2/0/0 or ATM 2/0/0. Each interface has a default maximum packet size or maximum transmission unit (MTU) size. This number generally defaults to the largest size possible for that type interface.
Note Changing the MTU value with the mtu interface configuration command can affect values for the protocol-specific versions of the command (ip mtu for example). If the value specified with the ip mtu interface configuration command is the same as the value specified with the mtu interface configuration command and you change the value for the mtu interface configuration command, the ip mtu value automatically matches the new mtu value. However, changing the value for the ip mtu configuration commands has no effect on the value for the mtu command.
The following example specifies an MTU of 4470 bytes.
Posted: Thu Jan 23 20:57:45 PST 2003
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