Cisco CCNA / CCNP Exam Tutorial: Testing ISDN Hyperlinks Without the need of Pings
To gain your Cisco CCNA and CCNP certifications, you’ve acquired to master ISDN – and despite what many people say, there’s however many ISDN out there that should be supported. And On the subject of troubleshooting ISDN, there’s a great deal to have a look at. Is the proper ISDN http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/먹튀검증 switchtype configured? Tend to be the dialer map statements appropriate? How about the dialer-group and dialer-checklist commands? Which’s just the start.
I usually say that each one troubleshooting starts off at Layer one, the Bodily layer with the OSI model. The standard means of troubleshooting ISDN is sending pings throughout the connection, even so the link is often analyzed without having utilizing pings or simply before assigning IP addresses to the BRI interfaces!
It’s a smart idea to put these check calls just before configuring the interfaces – that way, you understand you’ve received a valid connection in advance of commencing the configuration (and there’s plenty of config to associate with ISDN!)
To put a test get in touch with without having using pings, use the isdn phone interface command.
R1#isdn phone interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Trying to dial 8358662
03:54:43: %LINK-three-UPDOWN: Interface BRI0:1, altered condition to up
03:54:forty four: BR0:1 DDR: dialer protocol up
03:54:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, modified state to up
03:fifty four:49: %ISDN-six-Hook up: Interface BRI0:1 is now linked to 8358662 R2
To tear the test simply call down the right way, use isdn 먹튀검증업체 disconnect interface. IOS Enable shows the options with this particular command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data connect with(s) on all b channels
b1 Disconnect the info call on b1 channel
b2 Disconnect the data simply call on b2 channel
R1#isdn disconnect interface bri 0 all
03:58:36: BR0:one DDR: disconnecting call
03:fifty eight:36: BR0:2 DDR: disconnecting phone
03:fifty eight:36: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, simply call lasted 20 seconds
03:58:36: %Url-three-UPDOWN: Interface BRI0:one, modified condition to down
03:fifty eight:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, modified point out to down
I say “effectively” since the something you don’t desire to do to end an ISDN get in touch with, check or in any other case, is simply shut the interface. Telcos don’t like it, and ISDN lab gadgets like it even less. Constantly Enable the d-channel do its work and tear the call down within an orderly style – don’t just Minimize it off by shutting the interface down.