Yes you can but it seems to be platform specific: interface Serial4/1/2 no ip address no ip directed-broadcast no ip route-cache no ip mroute-cache loopback
C7500MIX#sh int ser 4/1/2 Serial4/1/2 is up, line protocol is up (looped) Hardware is cyBus Serial Dave Dimitris Vassilopoulos wrote: > > There is no way you can spoof a serial line to up/up state via > configuration... > > Here is what I did: > > ! > interface Serial1 > ip address 10.1.1.1 255.255.255.0 > loopback > no keepalive > ! > > Still... > > R2#sh int ser 1 > Serial1 is down, line protocol is down > Hardware is PQUICC Serial > Internet address is 10.1.1.1/24 > MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation HDLC, crc 16, loopback set > Keepalive not set > Scramble enabled > Last input never, output never, output hang never > Last clearing of "show interface" counters never > Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 > Queueing strategy: weighted fair > Output queue: 0/1000/64/0 (size/max total/threshold/drops) > Conversations 0/0/256 (active/max active/max total) > Reserved Conversations 0/0 (allocated/max allocated) > 5 minute input rate 0 bits/sec, 0 packets/sec > 5 minute output rate 0 bits/sec, 0 packets/sec > 0 packets input, 0 bytes, 0 no buffer > Received 0 broadcasts, 0 runts, 0 giants, 0 throttles > 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort > 0 packets output, 0 bytes, 0 underruns > 0 output errors, 0 collisions, 33 interface resets > 0 output buffer failures, 0 output buffers swapped out > 0 carrier transitions > Cable attached: No cable > Hardware config: No cable; DTE; DSR = DOWN DTR = DOWN RTS = DOWN > CTS = DOWN DCD = DOWN > > If you haven't attached a cable, serial interface will always be > down/down. > > Only if you build a harware loopback interface and can cross the correct > signals you can spoof the interface... > > Only the Ethernet intarfaces can be spoofed by disabling the keepalives.. > > Dvass -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=32448&t=32410 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
