Cisco CCNA / CCNP Exam Tutorial: Tests ISDN One-way links With out Pings
To get paid your Cisco CCNA and CCNP certifications, you’ve received to grasp ISDN – and Inspite of what some individuals say, there’s continue to lots of ISDN around that should be supported. And In regards to troubleshooting ISDN, there’s lots to take a look at. Is the proper ISDN switchtype configured? Will be the dialer map statements correct? What about the dialer-group and dialer-listing commands? And that’s just the start.
I often say that all troubleshooting begins at Layer 1, the Bodily layer of the OSI product. The same old technique of 안전놀이터 troubleshooting ISDN is sending pings over the website link, though the connection can be tested without the need of using pings or perhaps just before assigning IP addresses to your BRI interfaces!
It’s a smart idea to location these examination phone calls prior to configuring the interfaces – that way, you know you’ve acquired a legitimate connection ahead of commencing the configuration (and there’s a great deal of config to go along with ISDN!)
To put a check call devoid of working with pings, utilize the isdn get in touch with interface command.
R1#isdn simply call interface bri0 8358662
R1#
03:fifty four:43: BR0 DDR: Aiming to dial 8358662
03:fifty four:forty three: %Hyperlink-three-UPDOWN: Interface BRI0:1, altered state to up
03:fifty four:44: BR0:1 DDR: dialer protocol up
03:54:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, altered state to up
03:54:49: %ISDN-six-CONNECT: Interface BRI0:one is currently connected to 8358662 R2
To tear the take a look at call down effectively, use isdn disconnect interface. IOS Aid shows the choices with this particular command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data get in touch with(s) on all b channels
b1 Disconnect the information contact 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: BR0:2 DDR: disconnecting connect with
03:58:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, phone lasted twenty seconds
03:fifty eight:36: %Website link-three-UPDOWN: Interface BRI0:1, modified state to down
03:fifty eight:37: http://edition.cnn.com/search/?text=먹튀검증 %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:1, altered point out to down
I say “the right way” as the another thing you don’t would like to do to end an ISDN call, test or usually, is just shut the interface. Telcos don’t like it, and ISDN lab devices like it even much less. Often Allow the d-channel do its operate and tear the call down in an orderly vogue – don’t just Slice it off by shutting the interface down.