Cisco CCNA / CCNP Examination Tutorial: Testing ISDN Backlinks Without having Pings
To get paid your Cisco CCNA and CCNP certifications, you’ve got to master ISDN – and Inspite of what some individuals say, there’s however loads of ISDN around that needs to be supported. And when it comes to troubleshooting ISDN, there’s a whole lot to look at. Is the correct ISDN switchtype configured? Would be the dialer map statements correct? How about the dialer-team and dialer-record commands? And that’s just the beginning.
I generally say that each one troubleshooting starts at Layer one, the Bodily layer on the OSI model. The same old approach to troubleshooting ISDN is sending pings through the website link, though the link can be tested without the need of using pings or maybe just before assigning IP addresses into the BRI interfaces!
It’s a good idea to put these exam phone calls prior to configuring the interfaces – like that, you already know you’ve acquired a sound relationship ahead of commencing the configuration (and there’s loads of config to associate with ISDN!)
To place a examination connect with with out working with pings, use the isdn simply call interface command.
R1#isdn connect with interface bri0 8358662
R1#
03:54:43: BR0 DDR: Seeking to dial 8358662
03:54:forty three: %LINK-3-UPDOWN: Interface BRI0:one, adjusted state to up
03:fifty four:forty four: BR0:1 DDR: dialer protocol up
03:fifty four:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed point out to up
03:54:forty nine: %ISDN-6-Link: Interface BRI0:1 is now linked to 8358662 R2
To tear the test get in touch with down the right way, use isdn disconnect interface. IOS Enable shows the options with this command.
R1#isdn disconnect interface bri 0 토토먹튀 ?
all Disconnect the information connect with(s) on all b channels
b1 Disconnect the info simply call on b1 channel
b2 Disconnect the data phone on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:1 DDR: disconnecting call
03:58:36: BR0:2 DDR: disconnecting call
03:58:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, call lasted twenty seconds
03:fifty eight:36: %Backlink-3-UPDOWN: Interface BRI0:1, changed condition to down
03:fifty eight:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, changed state to down
I say “accurately” as the one thing you don’t wish to do to finish an ISDN get in touch with, take a look at http://www.bbc.co.uk/search?q=먹튀검증 or if not, is simply shut the interface. Telcos don’t like it, and ISDN lab products like it even much less. Often Allow the d-channel do its work and tear the decision down in an orderly manner – don’t just Reduce it off by shutting the interface down.