Cisco CCNA / CCNP Test Tutorial: Screening ISDN Links Without the need of http://edition.cnn.com/search/?text=먹튀검증 Pings
To generate your Cisco CCNA and CCNP certifications, you’ve received to grasp ISDN – and Even with what a number of people say, there’s continue to loads of ISDN available that should be supported. And With regards to troubleshooting ISDN, there’s a whole lot to look at. Is the right ISDN switchtype configured? Tend to be the dialer map statements appropriate? What about the dialer-group and dialer-record instructions? Which’s just the start.
I constantly say that all troubleshooting starts off at Layer one, the Actual physical layer on the OSI product. The usual approach to troubleshooting ISDN is sending pings over the connection, nevertheless the link might be analyzed with out making use of pings or perhaps before assigning IP addresses on the BRI interfaces!
It’s a smart idea to position these examination phone calls right before configuring the interfaces – this way, you understand you’ve obtained a sound connection right before starting the configuration (and there’s plenty of config to associate with ISDN!)
To position a test phone without the need of working with pings, make use of the isdn call interface command.
R1#isdn contact interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Aiming to dial 8358662
03:fifty four:43: %LINK-three-UPDOWN: Interface BRI0:one, improved condition to up
03:fifty four:44: BR0:1 DDR: dialer protocol up
03:fifty four:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, changed state to up
03:54:49: %ISDN-6-Hook up: Interface BRI0:1 has become linked to 8358662 R2
To tear the exam phone down effectively, use isdn disconnect interface. IOS Aid displays the choices using this command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the information connect with(s) on all b channels
b1 Disconnect the info contact on b1 channel
b2 Disconnect the data get in touch with on b2 channel
R1#isdn disconnect interface bri 0 all
03:58:36: BR0:one DDR: disconnecting connect with
03:58:36: BR0:2 DDR: disconnecting simply call
03:58:36: %ISDN-6-DISCONNECT: Interface BRI0:one disconnected from 8358662
R2, get in touch with lasted 20 seconds
03:58:36: %Url-3-UPDOWN: Interface BRI0:one, changed condition to down
03:58:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, modified state to down
I say “properly” because the something you don’t want to do to end an ISDN phone, exam or if not, is simply shut the interface. Telcos don’t like it, and ISDN lab equipment like it even a lot less. Constantly Permit the d-channel do its function and tear the call down in an orderly fashion 먹튀검증업체 – don’t just Minimize it off by shutting the interface down.