Cisco CCNA / CCNP Exam Tutorial: Tests ISDN Backlinks Without the need of Pings
To generate your Cisco CCNA and CCNP certifications, you’ve bought to grasp ISDN – and Even with what a number of people say, there’s nevertheless loads of ISDN around that should be supported. And In terms of troubleshooting ISDN, there’s quite a bit to have a look at. Is the correct ISDN switchtype configured? Tend to be the dialer map statements right? How about the dialer-group and dialer-list commands? Which’s just the beginning.
I usually say that all troubleshooting commences at Layer one, the Physical layer in the OSI design. The standard technique of troubleshooting ISDN is sending pings over the link, however the connection could be tested without utilizing pings or perhaps in advance of assigning IP addresses to your BRI interfaces!
It’s a good idea to place these exam calls ahead of configuring the interfaces – this way, you know you’ve received a sound relationship right before starting the configuration (and there’s a great deal of config http://www.bbc.co.uk/search?q=먹튀검증 to go with ISDN!)
To place a exam call without making use of pings, utilize the isdn contact interface command.
R1#isdn call interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Aiming to dial 8358662
03:fifty four:43: %Hyperlink-three-UPDOWN: Interface BRI0:one, changed point out to up
03:fifty four:44: BR0:one DDR: dialer protocol up
03:54:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, modified condition to up
03:54:forty nine: %ISDN-6-Hook up: Interface BRI0:one has become connected to 8358662 R2
To tear the check contact down correctly, use isdn disconnect interface. IOS Help 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 data phone on b1 channel
b2 안전놀이터 Disconnect the data simply call on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:1 DDR: disconnecting get in touch with
03:fifty eight:36: BR0:two DDR: disconnecting phone
03:58:36: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, simply call lasted twenty seconds
03:58:36: %LINK-three-UPDOWN: Interface BRI0:one, modified condition to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, adjusted state to down
I say “effectively” since the another thing you don’t choose to do to end an ISDN simply call, check or normally, is just shut the interface. Telcos don’t like it, and ISDN lab products like it even fewer. Generally Permit the d-channel do its work and tear the call down in an orderly vogue – don’t just Reduce it off by shutting the interface down.