Cisco CCNA / CCNP Test Tutorial: Tests ISDN One-way links Without Pings
To generate your Cisco CCNA and CCNP certifications, you’ve acquired to master ISDN http://www.thefreedictionary.com/먹튀검증 – and despite what some individuals say, there’s nonetheless plenty of ISDN around that should be supported. And On the subject of troubleshooting ISDN, there’s a good deal to have a look at. Is the correct ISDN switchtype configured? Are definitely the dialer map statements proper? What about the dialer-group and dialer-record commands? And that’s just the beginning.
I always say that every one troubleshooting starts at Layer 1, the Physical layer on the OSI product. The usual means of troubleshooting ISDN is sending pings across the backlink, nevertheless the link may be tested without having working with pings or maybe just before assigning IP addresses into the BRI interfaces!
It’s a good idea to location these exam phone calls before configuring the interfaces – that way, you already know you’ve acquired a legitimate relationship right before starting the configuration (and there’s many config to go together with ISDN!)
To place a take a look at call devoid of using pings, make use of the isdn phone interface command.
R1#isdn get in touch with interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Seeking to dial 8358662
03:54:forty three: %Backlink-3-UPDOWN: Interface BRI0:one, adjusted state to up
03:54:44: BR0:1 DDR: dialer protocol up
03:fifty four:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, improved point out to up
03:54:forty nine: %ISDN-six-Link: Interface BRI0:1 has become connected to 8358662 R2
To tear the exam get in touch with down appropriately, 토토검증 use isdn disconnect interface. IOS Assistance shows the choices with this particular command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data contact(s) on all b channels
b1 Disconnect the data connect with on b1 channel
b2 Disconnect the information phone on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:one DDR: disconnecting connect with
03:58:36: BR0:two DDR: disconnecting get in touch with
03:58:36: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, connect with lasted twenty seconds
03:58:36: %Hyperlink-three-UPDOWN: Interface BRI0:1, adjusted state to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, transformed point out to down
I say “correctly” because the another thing you don’t desire to do to end an ISDN call, check or normally, is simply shut the interface. Telcos don’t like it, and ISDN lab gadgets like it even a lot less. Usually Enable the d-channel do its operate and tear the decision down within an orderly vogue – don’t just Slash it off by shutting the interface down.