Cisco CCNA / CCNP Exam Tutorial: Tests ISDN Links With out Pings
To receive your Cisco CCNA and CCNP certifications, you’ve bought to grasp ISDN – and despite what lots of people say, there’s nevertheless a lot of ISDN around that needs to be supported. And In terms of troubleshooting ISDN, there’s a good deal to look at. Is the proper ISDN switchtype configured? Are definitely the dialer map statements appropriate? What about the dialer-group and dialer-checklist commands? And that’s just the start.
I generally say that every one troubleshooting commences at Layer one, the Bodily layer in the OSI model. The same old method of troubleshooting ISDN is sending pings across the backlink, but the connection can be analyzed with no making use of pings as well as just before assigning IP addresses to your BRI interfaces!
It’s a smart idea to put these exam calls ahead of configuring the interfaces 토토사이트 – like that, you know you’ve acquired a sound link in advance of commencing the configuration (and there’s a lot of config to go along with ISDN!)
To position a test simply call without making use of pings, use the isdn simply call interface command.
R1#isdn simply call interface bri0 8358662
R1#
03:54:43: BR0 DDR: Seeking to dial 8358662
03:54:forty three: %Connection-3-UPDOWN: Interface BRI0:one, adjusted point out to up
03:fifty four:44: BR0:1 DDR: dialer protocol up
03:fifty four:forty five: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:1, changed state to up
03:fifty four:49: %ISDN-6-Link: Interface BRI0:one is now linked to 8358662 R2
To tear the test simply call down effectively, use isdn disconnect interface. IOS Assist displays the options with this command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the info simply call(s) on all b channels
b1 Disconnect the information contact on b1 channel
b2 Disconnect the information simply call on b2 channel
R1#isdn disconnect interface bri 0 all
03:58:36: BR0:1 DDR: disconnecting contact
03:fifty eight:36: BR0:2 DDR: disconnecting contact
03:fifty http://www.bbc.co.uk/search?q=먹튀검증 eight:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, contact lasted 20 seconds
03:fifty eight:36: %Website link-three-UPDOWN: Interface BRI0:one, adjusted condition to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:1, adjusted point out to down
I say “accurately” as the something you don’t need to do to end an ISDN call, examination or if not, is just shut the interface. Telcos don’t like it, and ISDN lab gadgets like it even fewer. Usually Enable the d-channel do its get the job done and tear the decision down within an orderly fashion – don’t just Slice it off by shutting the interface down.