Cisco CCNA / CCNP Test Tutorial: Tests ISDN One-way links With out Pings
To gain your Cisco CCNA and CCNP certifications, you’ve bought to master ISDN – and Even with what some people say, there’s still plenty of ISDN in existence that needs to be supported. And On the subject of troubleshooting ISDN, there’s a lot to have a look at. Is the right ISDN switchtype configured? Are definitely the dialer map statements right? What about the dialer-group and dialer-list commands? And that’s just the start.
I generally say that every one troubleshooting begins at Layer 1, the Bodily layer on the OSI design. The same old method of troubleshooting ISDN is sending pings through the hyperlink, although the relationship might be tested without the need of utilizing http://edition.cnn.com/search/?text=먹튀검증 pings or simply ahead of assigning IP addresses to your BRI interfaces!
It’s a good idea to area these test phone calls ahead of configuring the interfaces – like that, you realize you’ve bought a legitimate relationship in advance of starting the configuration (and there’s plenty of config to go together with ISDN!)
To place a test simply call with out employing pings, make use of the isdn call interface command.
R1#isdn call interface bri0 8358662
R1#
03:54:forty three: BR0 DDR: Seeking to dial 8358662
03:fifty four:forty three: %Hyperlink-3-UPDOWN: Interface BRI0:1, adjusted state to up
03:fifty four:forty four: BR0:one DDR: dialer protocol up
03:54:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, changed condition to up
03:54:49: %ISDN-6-CONNECT: Interface BRI0:one is currently connected to 8358662 R2
To tear the take a look at call down properly, use isdn disconnect interface. IOS Help displays the options using this command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data contact(s) on all b channels
b1 Disconnect the data call on b1 channel
b2 Disconnect the info simply call on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:one DDR: disconnecting call
03:fifty eight:36: BR0:two DDR: disconnecting phone
03:fifty eight:36: %ISDN-six-DISCONNECT: Interface BRI0:one disconnected from 8358662
R2, get in touch with lasted 20 seconds
03:fifty eight:36: %Website link-three-UPDOWN: Interface BRI0:one, adjusted point out to down
03:fifty eight:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, altered point out to down
I say “the right way” because the another thing you don’t would like to do to finish an ISDN call, examination or usually, is just 먹튀검증업체 shut the interface. Telcos don’t like it, and ISDN lab gadgets like it even fewer. Often Allow the d-channel do its operate and tear the call down within an orderly trend – don’t just Reduce it off by shutting the interface down.