I have several remote sites connected via microwave links. There is an ongoing battle within my group that provides the routers, and the telecomms group that provides the microwave link, as to the cause of intermittent link problems we seem to be having. In the case of today, the error log on routers on both sides of the link report %LINEPROTO-5-UPDOWN constantly.
A show int on the interface on one side of the link shows
Serial1/0 is up, line protocol is down
Hardware is M4T
Description: 384k Link to TZRD08 Kulsary CC
Internet address is (removed)
MTU 1500 bytes, BW 384 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Last input 00:13:06, output 00:00:07, output hang never
Last clearing of "show interface" counters 19:58:08
Thanks for your reply, I have seen fog cause problems. We've got blue skies at the minute, and this problem has been going on for about 24 hours now. It's -15C and has gone down to -24 recently though...
Do you know why there can be problems at sunsise and sunset?
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 custome...