Cisco CCNA / CCNP Examination Tutorial: Testing ISDN Hyperlinks With out Pings
To receive your Cisco CCNA and CCNP certifications, you’ve got to grasp ISDN – and Inspite of what some people say, there’s still lots of ISDN to choose from that needs to be supported. And In regards to troubleshooting ISDN, there’s a good deal to look at. Is the proper ISDN switchtype configured? Are classified as the dialer map statements suitable? How about the dialer-team and dialer-list commands? And that’s just the beginning.
I always say that each one troubleshooting commences at Layer 1, the Bodily layer in the OSI model. The standard method of troubleshooting ISDN is sending pings through the website link, however the connection may be analyzed without the need of employing pings or even right before assigning IP addresses towards the BRI interfaces!
It’s a smart idea to area these exam phone calls ahead of configuring the interfaces – that way, you realize you’ve bought a legitimate link just before commencing the configuration (and there’s loads of config to go together with ISDN!)
To put a exam connect with devoid of working with pings, make use of the isdn contact interface command.
R1#isdn call interface bri0 8358662
R1#
03:54:forty three: BR0 DDR: Attempting to dial 8358662
03:fifty four:forty three: %Website link-three-UPDOWN: Interface BRI0:one, improved state to up
03:54:44: BR0:one DDR: dialer protocol up
03:54:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up
03:54:49: %ISDN-six-Link: Interface BRI0:1 is currently linked to 8358662 R2
To tear the take a look at call down the right way, use isdn disconnect interface. IOS Enable displays the options using this type of command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the info get in touch with(s) on all b channels
b1 Disconnect the info get 토토사이트 in touch with on b1 channel
b2 Disconnect the info contact on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:one DDR: disconnecting phone
03:fifty eight:36: BR0:2 DDR: disconnecting simply call
03:fifty eight:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, contact lasted twenty seconds
03:58:36: %Url-3-UPDOWN: Interface BRI0:1, improved condition to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:1, modified condition to down
I say “the right way” as the one thing you don’t desire to do to finish an ISDN contact, test or if not, is simply shut the interface. Telcos don’t like it, and ISDN lab products like it even considerably less. Generally Allow the d-channel do its function and tear the decision http://edition.cnn.com/search/?text=먹튀검증 down in an orderly fashion – don’t just Minimize it off by shutting the interface down.