Cisco CCNA / CCNP 안전공원 Test Tutorial: Tests ISDN Inbound links With out Pings
To earn your Cisco CCNA and CCNP certifications, you’ve obtained to master ISDN – and Irrespective of what lots of people say, there’s still a lot of ISDN available 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? Will be the dialer map statements proper? What about the dialer-team and dialer-record instructions? And that’s just the beginning.
I constantly say that every one troubleshooting commences at Layer one, the Physical layer from the OSI product. The same old means of troubleshooting ISDN is sending pings throughout the url, but the connection may be analyzed without having employing pings or maybe in advance of assigning IP addresses into the BRI interfaces!
It’s a smart idea to location these check calls before configuring the interfaces – this way, you realize you’ve received a valid http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/토토사이트 connection prior to beginning the configuration (and there’s a great deal of config to associate with ISDN!)
To put a take a look at phone with out working with pings, utilize the isdn contact interface command.
R1#isdn phone interface bri0 8358662
R1#
03:54:43: BR0 DDR: Attempting to dial 8358662
03:fifty four:43: %LINK-three-UPDOWN: Interface BRI0:1, changed state to up
03:fifty four:44: BR0:one DDR: dialer protocol up
03:54:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, modified point out to up
03:fifty four:forty nine: %ISDN-6-CONNECT: Interface BRI0:1 is currently linked to 8358662 R2
To tear the exam call down effectively, use isdn disconnect interface. IOS Aid shows the choices using this command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the data connect with(s) on all b channels
b1 Disconnect the data connect with on b1 channel
b2 Disconnect the information 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 get in touch with
03:58:36: %ISDN-six-DISCONNECT: Interface BRI0:1 disconnected from 8358662
R2, contact lasted 20 seconds
03:fifty eight:36: %Website link-three-UPDOWN: Interface BRI0:one, adjusted point out to down
03:fifty eight:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:1, adjusted state to down
I say “accurately” since the another thing you don’t wish to do to finish an ISDN simply call, take a look at or in any other case, is just shut the interface. Telcos don’t like it, and ISDN lab gadgets like it even less. Normally Permit the d-channel do its do the job and tear the decision down in an orderly fashion – don’t just cut it off by shutting the interface down.