Hi there,
I have two CISCO1921/K9 routers,
I usually use Router01, and Router02 is cold standby router.
These routers are used for dial-up connection.
Dial-up is connected when the router receives packet.
So,dial-up is not keep connecting.
ISDN line is connected only Router01 interface BRI0/0/0.
If Router01 is failed, I connect the ISDN line to Router02.
I'd like to build HSRP or VRRP with these routers.
Like this:
Router01 is master router, Router02 is standby router.
Router01 tracks BRI0/0/0 interface link-status.
When the ISDN line is disconnected, Router01 decrements own priority.
Then Router02 will be a master router.
But, BRI interface is still up when I disconnected ISDN line from BRI interface.
How can I track BRI interface?
I'd like to make interface down when I disconnect ISDN line.
To compare two interfaces, I did like this:
BRI0/0/0: ISDN line is connected
BRI0/1/0: ISDN line is not connected
Router01#show ip int brief
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/0 172.20.20.2 YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM administratively down down
BRI0/0/0 unassigned YES NVRAM up up <-- ISDN line is connected
BRI0/1/0 unassigned YES NVRAM up up <-- ISDN line is not connected
BRI0/0/0:1 unassigned YES unset down down
BRI0/0/0:2 unassigned YES unset down down
BRI0/1/0:1 unassigned YES unset down down
BRI0/1/0:2 unassigned YES unset down down
Dialer1 unassigned YES IPCP up up
Dialer2 unassigned YES IPCP up up
NVI0 unassigned YES unset administratively down down
Router01#
Router-01#show int bri 0/0/0
BRI0/0/0 is up, line protocol is up (spoofing) <--ISDN line is connected
Hardware is HDLC BRI (3086)
MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
Keepalive not set
Last input 00:00:07, output never, output hang never
Last clearing of "show interface" counters 2y10w
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
(omitted)
Router-01#show int bri 0/1/0
BRI0/1/0 is up (spoofing), line protocol is up (spoofing) <--ISDN line is not connected
Hardware is HDLC BRI (3086)
MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
Keepalive not set
Last input never, output never, output hang never
Last clearing of "show interface" counters 2y10w
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
(omitted)
Router01#show isdn status
Global ISDN Switchtype = ntt
ISDN BRI0/0/0 interface
dsl 0, interface ISDN Switchtype = ntt
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 64, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000003
ISDN BRI0/1/0 interface
dsl 4, interface ISDN Switchtype = ntt
Layer 1 Status:
DEACTIVATED
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 4 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
Router-01#
Thanks in advance.
