10-31-2007 10:09 PM
Hello,
Got a question about BRI interface
Is there any way to disable BRI interface manually when primary link is up?
I had a situation where both BRI and Serial link were up and running
i reset the primary BRI0/1/0 and now BRI sub-interfaces are showing down..but still primary bri int showing up up (spoofing).
what does spoofing means?
RouterA(config-if)#do sh int BRI0/1/0
BRI0/1/0 is up, line protocol is up (spoofing) >>>>>>>>>>>
Hardware is GT96K BRI with U interface (3086)
Description: circuit id 50.ibsd.515307
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
Last input 00:00:28, output never, output hang never
Last clearing of "show interface" counters 6w3d
Input queue: 0/75/115/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
296542 packets input, 1320737 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
115 input errors, 113 CRC, 0 frame, 0 overrun, 0 ignored, 104 abort
329534 packets output, 1582923 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
RouterA(config-if)#do sh ip int brie
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 10.X.160.1 YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM administratively down down
Serial0/0/0 unassigned YES NVRAM up up
Serial0/0/0.1 10.X.252.21 YES NVRAM up up
BRI0/1/0 unassigned YES NVRAM up up
BRI0/1/0:1 unassigned YES unset down down >>> >>>
BRI0/1/0:2 unassigned YES unset down down >>>>>>
Dialer0 unassigned YES IPCP up up
Loopback0 10.X.3.169 YES NVRAM up up
RouterA(config-if)#
Really appreaciate anyone's explanation.
Thanks in advance
SiraJ
10-31-2007 11:53 PM
To begin with the last question: The status as observed is in fact normal behaviour.
Spoofing is in other words "faked up". An interface that's inactive normally goes down which also causes all routes running over it to be dropped from the routing table. This status was implemented to allow dialers to keep their static routes also when the dialer was inactive. Check with the command "show dialer" to see if there is any undesired calling action.
Use an access-list to allow traffic to activate the dialer.
regards,
Leo
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