Cisco CCNA / CCNP Examination Tutorial: Testing ISDN Backlinks With no Pings
To receive your Cisco CCNA and CCNP certifications, you’ve received to master ISDN – and Regardless of what a lot 토토먹튀 of people say, there’s continue to a great deal of ISDN on the market that should be supported. And On the subject of troubleshooting ISDN, there’s a great deal to have a look at. Is the right ISDN switchtype configured? Are definitely the dialer map statements appropriate? How about the dialer-team and dialer-list commands? Which’s just the start.
I usually say that every one troubleshooting begins at Layer 1, the Actual physical layer of the OSI design. The standard means of troubleshooting ISDN is sending pings throughout the backlink, although the connection may be analyzed devoid of working with pings and even in advance of assigning IP addresses towards the BRI interfaces!
It’s a smart idea to spot these take a look at phone calls in advance of configuring the interfaces – this way, you realize you’ve got a sound relationship prior to commencing the configuration (and there’s a great deal of config to go together with ISDN!)
To place a examination connect with devoid of applying pings, utilize the isdn connect with interface command.
R1#isdn call interface https://en.search.wordpress.com/?src=organic&q=먹튀검증 bri0 8358662
R1#
03:54:forty three: BR0 DDR: Aiming to dial 8358662
03:54:43: %Backlink-3-UPDOWN: Interface BRI0:one, changed point out to up
03:fifty four:44: BR0:1 DDR: dialer protocol up
03:fifty four:45: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, improved point out to up
03:fifty four:forty nine: %ISDN-six-CONNECT: Interface BRI0:one is now linked to 8358662 R2
To tear the exam get in touch with down the right way, use isdn disconnect interface. IOS Help shows the options with this particular command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the info contact(s) on all b channels
b1 Disconnect the data contact on b1 channel
b2 Disconnect the info phone on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:one DDR: disconnecting connect with
03:fifty eight:36: BR0:two DDR: disconnecting contact
03:58:36: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, phone lasted 20 seconds
03:58:36: %LINK-three-UPDOWN: Interface BRI0:1, modified state to down
03:fifty eight:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, transformed point out to down
I say “correctly” because the another thing you don’t wish to do to finish an ISDN call, check or normally, is simply shut the interface. Telcos don’t like it, and ISDN lab units like it even a lot less. Often Allow the d-channel do its work and tear the decision down in an orderly trend – don’t just Minimize it off by shutting the interface down.