Technical data

Step 4—Configuring BRI
Dial Solutions Quick Configuration Guide
3-10
Verify
•
You should see the following output messages after you enter the no shutdown command.
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.
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)#
• Check the ISDN status by entering the show isdn status command:
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
Note Here are some defined terms from the output. DSL = Digital Subscriber Loop. CCBs = Call
Control Blocks. TEI = Terminal Equipment Identifier. LDN = Local Directory Number. The BRI 0
interface corresponds to dsl 0, which has three channels (2B + D). The CCB counter increases by 1
for each active call on the Cisco 1604. The CCB counter for one call gets destroyed upon disconnect.
• Enter the show ip interface brief command to check the current state of the interface.
robo-austin# show ip interface brief
Interface IP-Address OK? Method Status Protocol
BRI0 10.1.254.4 YES manual up up
BRI0:1 unassigned YES unset down down
BRI0:2 unassigned YES unset down down
Ethernet0 10.1.4.1 YES manual up up
Serial0 unassigned YES unset administratively down down