Cisco CCNA / CCNP Test Tutorial: Tests ISDN Inbound links With no Pings
To gain your Cisco 먹튀사이트 CCNA and CCNP certifications, you’ve obtained to master ISDN – and In spite of what some people say, there’s still plenty of ISDN available that should be supported. And On the subject of troubleshooting ISDN, there’s quite a bit to take a look at. Is the right ISDN switchtype configured? Will be the dialer map statements right? What about the dialer-team and dialer-list commands? Which’s just the beginning.
I usually say that each one troubleshooting commences at Layer one, the Physical layer on the OSI product. The same old way of troubleshooting ISDN is sending pings across the connection, nevertheless the relationship is often tested devoid of using pings and even ahead of assigning IP addresses for the BRI interfaces!
It’s a good idea to area these exam phone calls before configuring the interfaces – that way, you realize you’ve obtained a sound connection ahead of commencing the configuration (and there’s lots of config to associate with ISDN!)
To put a examination get in touch with devoid of applying pings, make use of the isdn simply call interface command.
R1#isdn contact interface bri0 8358662
R1#
03:fifty four:forty three: BR0 DDR: Seeking to dial 8358662
03:fifty four:forty three: %Url-3-UPDOWN: Interface BRI0:one, transformed point out to up
03:fifty four:44: BR0:one DDR: dialer protocol up
03:fifty four:forty five: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:one, altered state to up
03:fifty four:49: %ISDN-6-Link: Interface BRI0:1 is now connected to 8358662 R2
To tear the check phone down appropriately, use isdn disconnect interface. IOS Aid shows the options using this type of command.
R1#isdn disconnect interface bri 0 ?
all Disconnect the info simply call(s) on all b channels
b1 Disconnect the data connect with on b1 channel
b2 Disconnect the data call on b2 channel
R1#isdn disconnect interface bri 0 all
03:fifty eight:36: BR0:one DDR: disconnecting get in touch with
03:58:36: BR0:two DDR: disconnecting call
03:58:36: %ISDN-six-DISCONNECT: Interface BRI0:one disconnected from 8358662
R2, connect with lasted 20 seconds
03:58:36: %Url-3-UPDOWN: Interface BRI0:one, altered condition to down
03:58:37: %LINEPROTO-five-UPDOWN: Line protocol on Interface BRI0:one, adjusted state to down
I say “accurately” because the one thing you don’t wish to do to end an ISDN contact, exam or if not, is https://www.washingtonpost.com/newssearch/?query=먹튀검증 just shut the interface. Telcos don’t like it, and ISDN lab devices like it even considerably less. Always Allow the d-channel do its function and tear the decision down within an orderly trend – don’t just cut it off by shutting the interface down.