Recently we have purchased some 1841 routers with Serial and ISDN modules. The 1841 is to replace the 1760 router (out of sales) due to our network expansion.
We noticed the ISDN interface Bri0/1/0 and BRI0/1/0:1 interface is up but did not dial. Only when the ISDN cable is unplug and plug back then it starts to dial and connect successfully to our core router.
I have tested the 1760 with 123-14.T7 ISO code, no problem at all. The ISDN is able to dial automatic with out unplugging and reconnect back.
Below are the results of the test and the Serial/ISDN configuration. Please advice.
1. Using 1760 router with c1700-y-mz.123-14.T7.bin
No problem encounter, everything working as per normal. Able to ping to core router after ISDN connection kicks up (ping test perform to the core router).
2 Using 1841 router with c1841-ipbase-mz.124-1c.bin (default IOS come with router)
Pull out the serial cable by simulate serial connection fail. We noticed the ISDN * BRI0/1/0 is up but not BRI0/1/0:1
3. Using 1841 router with c1841-entbase-mz.123-14.T7.bin.
Pull out the serial cable by simulate serial connection fail. We noticed the ISDN interface BRI0/1/0 and BRI0/1/0:1 is up but dialing intermittent. 1st time unplugged the serial, it will auto dial and connect successful. But fail on second time onwards.
4. Using 1841 router with c1841-entbase-mz.124-8c.bin
Pull out the serial cable by simulate serial connection fail. We noticed the ISDN interface BRI0/1/0 and BRI0/1/0:1 is up but fail to dial. Only when the ISDN cable is unplug and plug then it starts to dial and connect successfully to our core router (ping test perform to the core router)
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...