Cisco CCNA / CCNP Test Tutorial: Tests ISDN Inbound links With out Pings
To make your Cisco CCNA and CCNP certifications, you’ve got to learn ISDN – and http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/먹튀검증 Regardless of what lots of people say, there’s still plenty of ISDN to choose from that needs to be supported. And In relation to troubleshooting ISDN, there’s lots to have a look at. Is the right ISDN switchtype configured? Would be the dialer map statements correct? What about the dialer-team and dialer-checklist instructions? And that’s just the start.
I generally say that every one troubleshooting starts at Layer 1, the Actual physical layer with the OSI model. The standard way of troubleshooting ISDN is 토토검증 sending pings through the url, although the link might be tested without the need of using pings as well as prior to assigning IP addresses for the BRI interfaces!
It’s a smart idea to spot these test calls in advance of configuring the interfaces – this way, you recognize you’ve received a legitimate connection ahead of beginning the configuration (and there’s plenty of config to go along with ISDN!)
To put a check connect with without the need of utilizing pings, make use of the isdn contact interface command.
R1#isdn contact interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Attempting to dial 8358662
03:54:forty three: %Backlink-3-UPDOWN: Interface BRI0:1, modified point out to up
03:54:forty four: BR0:one DDR: dialer protocol up
03:54:forty five: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, improved state to up
03:fifty four:49: %ISDN-6-Link: Interface BRI0:1 is now connected to 8358662 R2
To tear the test phone down the right way, use isdn disconnect interface. IOS Assist displays the choices with this command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data phone(s) on all b channels
b1 Disconnect the information connect with on b1 channel
b2 Disconnect the info connect with on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:1 DDR: disconnecting connect with
03:fifty eight:36: BR0:two DDR: disconnecting simply call
03:fifty eight:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, simply call lasted 20 seconds
03:58:36: %Hyperlink-3-UPDOWN: Interface BRI0:1, changed state to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, transformed condition to down
I say “appropriately” since the one thing you don’t desire to do to finish an ISDN phone, check or normally, is just shut the interface. Telcos don’t like it, and ISDN lab equipment like it even fewer. Normally let the d-channel do its operate and tear the call down within an orderly trend – don’t just Slice it off by shutting the interface down.