I have seen this problem a number of times on our Cisco 897 routers.
if the ATM interface flaps the virtual interface comes back up but the Dialer interface stays down.
It seems the only way to recover is to reload the router.
below is relevant config and output fro sh int di 1 when down
anybody else seen this problem?
interface ATM0
no ip address
no atm ilmi-keepalive
!
interface ATM0.1 point-to-point
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
interface Dialer1
ip address negotiated
ip access-group Internet-ACL in
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
dialer idle-timeout 0
dialer down-with-vInterface
dialer-group 1
ppp authentication chap callin
ppp chap hostname xxxx.xxx
ppp chap password yyyyyy
below is sh int di 1
Dialer1 is down, line protocol is down
Hardware is Unknown
Internet address is xx.xx.xx.xx/32
MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 1 seconds on reset
Interface is bound to Vi2
Last input never, output never, output hang never
Last clearing of "show interface" counters 07:24:21
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
300842 packets input, 210743258 bytes
305884 packets output, 64407064 bytes
Bound to:
Virtual-Access2 is up, line protocol is up
Hardware is Virtual Access interface
MTU 1500 bytes, BW 747 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Stopped: CDPCP
Open: IPCP
PPPoATM vaccess, cloned from Dialer1
Vaccess status 0x44
Bound to ATM0.1 VCD: 1, VPI: 8, VCI: 35, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 5 seconds on reset
Interface is bound to Di1 (Encapsulation PPP)
Last input 00:00:03, output never, output hang never
Last clearing of "show interface" counters 07:22:33
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
304391 packets input, 210956216 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
305936 packets output, 64408106 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
