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Cisco IOS in a Nutshell (In a Nutshell (OReilly)) - page 619

isdn tei

global

isdn tei [first-call  powerup]
no isdn tei

Configures

ISDN endpoint negotiation

Default

powerup

Description

TEI stands for Terminal Endpoint Identifier. This command enables TEI negotiation on the ISDN interface. TEI negotiation occurs at powerup or when it places its first call ( first-call ).

isdn tei-negotiation

global, interface

isdn tei-negotiation {first-call  powerup}
no isdn tei-negotiation

Configures

When TEI negotiation occurs

Default

powerup

Description

This command sets when TEI negotiation occurs. By default, negotiation takes place when the router is first turned on ( powerup ). The first-call option states that negotiation should occur when the first ISDN call is placed or received.

isdn transfer-code

interface

isdn transfer-code


code


no isdn transfer-code

Configures

Call transferring

Default

Description

This command enables call transferring. This feature is available only if your service provider supports it. code is supplied by your service provider.

isdn twait-disable

interface

isdn twait-disable
no isdn twait-disable

Configures

Time to wait on startup

Default

Enabled

Description

After a power failure, ISDN interfaces wait a random period of time (1 to 300 seconds) before starting up. This command prevents the interfaces from coming back online at the same time when power is restored and the ISDN devices are restarting. This feature can be disabled with the no form of this command.

isdn voice-priority

interface

isdn voice-priority


ISDN-directory-number


{in  out} {always  conditional 
off}
no isdn voice-priority


ISDN-directory-number

Configures

The priority of data and voice calls

Default

A data call is never bumped

Description

This command allows you to set the priority of a data call relative to a voice call. ISDN-directory-number is the directory number assigned by your telephone company. in and out specify whether the command applies to incoming or outgoing voice calls. always means always bump a data call for a voice call. conditional means bump a data call if there is more than one call to the same destination. off means never bump a data call for a voice call.

isis advertise-prefix

interface

isis advertise-prefix
no isis advertise-prefix

Configures

Advertising of IP prefixes for IS-IS routing

Default

Enabled

Description

By default, IP prefixes of connected networks are advertised in LSP advertisements for IS-IS interfaces. To disable the advertisement of connected networks, use the no form of this command.

isis authentication key-chain

interface

isis authentication key-chain


name


[level-1  level-2]
no isis authentication key-chain


name


[level-1  level-2]

Configures

Authentication for IS-IS routing

Default

None

Description

This command enables authentication for IS-IS routing on an interface. The name of the key-chain specifies the group of valid keys. The optional keywords level-1 and level-2 specify that packets from level-1 or level-2 routers must be authenticated.

isis authentication mode

interface

isis authentication mode {md5  text} [level-1  level-2 ]
no isis authentication mode {md5  text} [level-1  level-2]

Configures

Authentication for IS-IS routing

Default

Disabled

Description

This command configures the type of authentication for IS-IS routing on a interface. The type can be md5 (Message Digest 5) or text (clear text). The optional keywords level-1 and level-2 specify that packets from level-1 or level-2 routers must be authenticated.