Cisco Systems 1604 manual Verifying BRI Configuration, Field, Description, 3-11

Chapter 3 Configuring the Cisco 1604 Router

Verifying BRI Configuration

Verifying BRI Configuration

Step 1 Enter the no shutdown command. The following output messages appear:

robo-austin(config-if)# no shutdown robo-austin#

00:45:01: %LINK-3-UPDOWN:Interface BRI0:1, changed state to down

00:45:01: %LINK-3-UPDOWN:Interface BRI0:2, changed state to down

00:45:01: %LINK-3-UPDOWN:Interface BRI0, changed state to up robo-austin#

00:45:02: %ISDN-6-LAYER2UP:Layer 2 for Interface BR0, TEI 100 changed to up

00:45:02: %ISDN-6-LAYER2UP:Layer 2 for Interface BR0, TEI 101 changed to up robo-austin(config-if)#

This example shows the BRI0:1 and BRI0:2 states change to “down” because the previous state was “administratively down.” The BRI0 D channel changes to “up” as it spoofs for the two B channels. After the D channel finds the B channels, the B channels change state to “up.” The Cisco 1604 communicates with the telephone switch and receives its TEI numbers for its two B channels.

Step 2 Enter the show isdn status command to check the Cisco 1604’s ISDN status:

robo-austin#show isdn status

	Global ISDN	Switchtype = basic-ni
	ISDN BRI0 interface
	dsl	0, interface ISDN Switchtype = basic-ni
	Layer 1	Status:
	ACTIVE
	Layer 2	Status:
	TEI	= 100, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
	TEI	= 101, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
	Spid Status:
	TEI	100, ces = 1, state = 5(init)
		spid1 configured, no LDN, spid1 sent, spid1 valid
		Endpoint ID Info: epsf = 0, usid = 2, tid = 1
	TEI	101, ces = 2, state = 5(init)
		spid2 configured, no LDN, spid2 sent, spid2 valid
		Endpoint ID Info: epsf = 0, usid = 4, tid = 1
	Layer 3	Status:
	0 Active Layer 3 Call(s)
	Activated dsl 0 CCBs = 0
	Total Allocated ISDN CCBs = 0
	The fields in the output example resulting from Step 2 above are described in Table 3-2:
Table 3-2 Field Descriptions for the show isdn status Command Output
Field	Description
BRI0	Basic Rate Interface. The BRI 0 interface corresponds to DSL-0, which has three channels (2B +D).
DSL	Digital Subscriber Line.
TEI	Terminal Equipment Identifier.
CCB	Call Control Block.
LDN	Local Directory Number.
SPID	Service Profile Identifier.

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