Hi!
Router is Cisco C898EA-K9. Router loses connection to internet for 5-10 seconds few times a day. Here's part of output of show logging from this day:
Oct 23 07:49:10.099: %SHDSL_EA-6-DSLGROUP_UPDOWN: SHDSL 0 dsl-group state changed to down.
Oct 23 07:49:17.171: %LINK-3-UPDOWN: Interface ATM0, changed state to down
Oct 23 07:49:17.171: %BGP-5-NBR_RESET: Neighbor [IP ADDRESS] reset (Interface flap)
Oct 23 07:49:17.171: %BGP-5-ADJCHANGE: neighbor [IP ADDRESS] Down Interface flap
Oct 23 07:49:17.171: %BGP_SESSION-5-ADJCHANGE: neighbor [IP ADDRESS] IPv4 Unicast topology base removed from session Interface flap
Oct 23 07:49:18.171: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down
Oct 23 07:49:33.831: %SHDSL_EA-6-DSLGROUP_UPDOWN: SHDSL 0 dsl-group state changed to up.
Oct 23 07:49:37.187: %LINK-3-UPDOWN: Interface ATM0, changed state to up
Oct 23 07:49:38.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to up
Oct 23 07:49:42.339: %BGP-3-NOTIFICATION: received from neighbor [IP ADDRESS] active 6/5 (Connection Rejected) 0 bytes
Oct 23 07:49:42.339: %BGP-5-NBR_RESET: Neighbor [IP ADDRESS] active reset (BGP Notification received)
Oct 23 07:49:42.339: %BGP-5-ADJCHANGE: neighbor [IP ADDRESS] active Down BGP Notification received
Oct 23 07:49:42.339: %BGP_SESSION-5-ADJCHANGE: neighbor [IP ADDRESS] IPv4 Unicast topology base removed from session BGP Notification received
Oct 23 07:49:52.576: %BGP-3-NOTIFICATION: received from neighbor [IP ADDRESS] active 6/5 (Connection Rejected) 0 bytes
Oct 23 07:49:52.576: %BGP-5-NBR_RESET: Neighbor [IP ADDRESS] active reset (BGP Notification received)
Oct 23 07:49:52.576: %BGP-5-ADJCHANGE: neighbor [IP ADDRESS] active Down BGP Notification received
Oct 23 07:49:52.576: %BGP_SESSION-5-ADJCHANGE: neighbor [IP ADDRESS] IPv4 Unicast topology base removed from session BGP Notification received
Oct 23 07:50:00.768: %BGP-3-NOTIFICATION: received from neighbor [IP ADDRESS] active 6/5 (Connection Rejected) 0 bytes
Oct 23 07:50:00.768: %BGP-5-NBR_RESET: Neighbor [IP ADDRESS] active reset (BGP Notification received)
Oct 23 07:50:00.768: %BGP-5-ADJCHANGE: neighbor [IP ADDRESS] active Down BGP Notification received
Oct 23 07:50:00.768: %BGP_SESSION-5-ADJCHANGE: neighbor [IP ADDRESS] IPv4 Unicast topology base removed from session BGP Notification received
Oct 23 07:50:09.168: %BGP-5-ADJCHANGE: neighbor [IP ADDRESS] Up
As you can see, I obfuscated IP address. And here's output of interface used for internet access:
ATM0.100 is up, line protocol is up
Hardware is MPC/AOE ATMSAR, address is xxxx.xxxx.xxxx (bia xxxx.xxxx.xxxx)
Internet address is [IP ADDRESS]/31
MTU 1940 bytes, BW 5696 Kbit/sec, DLY 60 usec,
reliability 255/255, txload 15/255, rxload 12/255
Encapsulation ATM
ARP type: ARPA, ARP Timeout 04:00:00
Keepalive not supported
162141016 packets input, 81759838449 bytes
128638995 packets output, 32938583661 bytes
0 OAM cells input, 0 OAM cells output
AAL5 CRC errors : 0
AAL5 SAR Timeouts : 0
AAL5 Oversized SDUs : 0
Last clearing of "show interface" counters never
So no CRC errors either. Output of ATM 0:
ATM0 is up, line protocol is up
Hardware is MPC/AOE ATMSAR, address is xxxx.xxxx.xxxx (bia xxxx.xxxx.xxxx)
MTU 1940 bytes, sub MTU 1940, BW 5696 Kbit/sec, DLY 60 usec,
reliability 255/255, txload 16/255, rxload 13/255
Encapsulation ATM, loopback not set
Keepalive not supported
Encapsulation(s): AAL5
8 maximum active VCs, 1024 VCs per VP, 1 current VCCs
VC Auto Creation Disabled.
VC idle disconnect time: 300 seconds
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 55074
Queueing strategy: Per VC Queueing
5 minute input rate 305000 bits/sec, 263 packets/sec
5 minute output rate 358000 bits/sec, 189 packets/sec
162147772 packets input, 82410830511 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
128655850 packets output, 32942413446 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
Any idea why internet connection disconnects happen? BTW I'm only CCNET certified and this goes way above my understanding, but I'm trying to do my best! :)
