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IPv6 packetloss after PPP drop.

chrcoluk
Grafter
Posts: 1,990
Thanks: 5
Registered: ‎11-12-2013

IPv6 packetloss after PPP drop.

6.22pm yesterday evening my PPP dropped and reconnected.
Since then is steady consistent packetloss.
ipv4 gateway is central10.pcl-ag06 ipv6 is 2a02:16c8:0:1::16
will add graph to post.
ipv6


ipv4 without the loss


edit now hopped to central10.pcl-ag03 ipv6 2a02:16c8:0:1::13 and packetloss gone.
router logs, modem is synced fine, uptime 38 days.
Nov 26 18:21:12 pppd[1065]: Serial link appears to be disconnected.
Nov 26 18:21:12 pppd[1065]: Connect time 37534.0 minutes.
Nov 26 18:21:12 pppd[1065]: Sent 247484269 bytes, received 1740095182 bytes.
Nov 26 18:21:12 rc_service: ipv6-down 14534:notify_rc stop_rdnssd
Nov 26 18:21:12 rc_service: ipv6-down 14534:notify_rc stop_radvd
Nov 26 18:21:12 radvd[1174]: attempting to reread config file
Nov 26 18:21:12 radvd[1174]: resuming normal operation
Nov 26 18:21:12 rc_service: waitting "stop_rdnssd" via ipv6-down ...
Nov 26 18:21:12 dnsmasq[12748]: read /etc/hosts - 6 addresses
Nov 26 18:21:13 dnsmasq[12748]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:21:13 dnsmasq[12748]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:21:13 dnsmasq-dhcp[12748]: read /etc/ethers - 5 addresses
Nov 26 18:21:13 dnsmasq[12748]: using local addresses only for domain MerlinASUS
Nov 26 18:21:13 dnsmasq[12748]: using nameserver 212.159.6.9#53
Nov 26 18:21:13 dnsmasq[12748]: using nameserver 212.159.6.10#53
Nov 26 18:21:13 rdnssd[1129]: Child process hung up unexpectedly, aborting
Nov 26 18:21:13 radvd[1174]: Exiting, sigterm or sigint received.
Nov 26 18:21:13 radvd[1174]: sending stop adverts
Nov 26 18:21:13 radvd[1174]: removing /var/run/radvd.pid
Nov 26 18:21:14 dhcp6c[1166]: client6_send: transmit failed: Network is unreachable
Nov 26 18:21:15 dnsmasq[12748]: read /etc/hosts - 6 addresses
Nov 26 18:21:15 dnsmasq[12748]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:21:15 dnsmasq[12748]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:21:15 dnsmasq-dhcp[12748]: read /etc/ethers - 5 addresses
Nov 26 18:21:15 dnsmasq[12748]: using local addresses only for domain MerlinASUS
Nov 26 18:21:15 dnsmasq[12748]: using nameserver 212.159.6.9#53
Nov 26 18:21:15 dnsmasq[12748]: using nameserver 212.159.6.10#53
Nov 26 18:21:15 WAN Connection: Fail to connect with some issues.
Nov 26 18:21:15 stop_nat_rules: apply the redirect_rules!
Nov 26 18:21:18 pppd[1065]: Connection terminated.
Nov 26 18:21:18 pppd[1065]: Connect time 37534.0 minutes.
Nov 26 18:21:18 pppd[1065]: Sent 247484269 bytes, received 1740095182 bytes.
Nov 26 18:21:18 pppd[1065]: Sent PADT
Nov 26 18:21:19 pppd[1065]: Modem hangup
Nov 26 18:22:04 pppd[1065]: Timeout waiting for PADO packets
Nov 26 18:22:39 pppd[1065]: PPP session is 450 (0x1c2)
Nov 26 18:22:39 pppd[1065]: Connected to <censored> via interface eth0
Nov 26 18:22:39 pppd[1065]: Using interface ppp0
Nov 26 18:22:39 pppd[1065]: Connect: ppp0 <--> eth0
Nov 26 18:22:40 pppd[1065]: CHAP authentication succeeded
Nov 26 18:22:40 pppd[1065]: CHAP authentication succeeded
Nov 26 18:22:40 pppd[1065]: peer from calling number <censored> authorized
Nov 26 18:22:40 pppd[1065]: local  LL address <censored>
Nov 26 18:22:40 pppd[1065]: remote LL address <censored>
Nov 26 18:22:40 pppd[1065]: local  IP address 81.<censored>
Nov 26 18:22:40 pppd[1065]: remote IP address 195.<censored>
Nov 26 18:22:40 pppd[1065]: primary  DNS address 212.159.6.10
Nov 26 18:22:40 pppd[1065]: secondary DNS address 212.159.6.9
Nov 26 18:22:41 rc_service: ip-up 14547:notify_rc start_firewall
Nov 26 18:22:41 rc_service: ip-up 14547:notify_rc stop_upnp
Nov 26 18:22:41 rc_service: waitting "start_firewall" via ip-up ...
Nov 26 18:22:41 syslog: module nf_conntrack_ipv6 not found in modules.dep
Nov 26 18:22:41 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Nov 26 18:22:41 dnsmasq[12748]: exiting on receipt of SIGTERM
Nov 26 18:22:41 dnsmasq[14575]: started, version 2.72test3 cachesize 1500
Nov 26 18:22:41 dnsmasq[14575]: asynchronous logging enabled, queue limit is 5 messages
Nov 26 18:22:41 dnsmasq-dhcp[14575]: DHCP, IP range 192.168.1.1 -- 192.168.1.128, lease time 1d
Nov 26 18:22:41 dnsmasq-dhcp[14575]: DHCP, sockets bound exclusively to interface br0
Nov 26 18:22:41 dnsmasq[14575]: using local addresses only for domain MerlinASUS
Nov 26 18:22:41 dnsmasq[14575]: read /etc/hosts - 6 addresses
Nov 26 18:22:41 dnsmasq[14575]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:22:41 dnsmasq[14575]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:22:41 dnsmasq-dhcp[14575]: read /etc/ethers - 5 addresses
Nov 26 18:22:41 dnsmasq[14575]: using local addresses only for domain MerlinASUS
Nov 26 18:22:41 dnsmasq[14575]: using nameserver 212.159.6.10#53
Nov 26 18:22:41 dnsmasq[14575]: using nameserver 212.159.6.9#53
Nov 26 18:22:42 rc_service: ip-up 14547:notify_rc start_upnp
Nov 26 18:22:42 rc_service: waitting "stop_upnp" via ip-up ...
Nov 26 18:22:45 WAN Connection: WAN was restored.
Nov 26 18:22:50 rc_service: ipv6-up 14545:notify_rc start_rdnssd
Nov 26 18:22:50 rc_service: ipv6-up 14545:notify_rc start_firewall
Nov 26 18:22:50 rc_service: waitting "start_rdnssd" via ipv6-up ...
Nov 26 18:22:51 syslog: module nf_conntrack_ipv6 not found in modules.dep
Nov 26 18:22:52 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Nov 26 18:22:52 dnsmasq[14575]: exiting on receipt of SIGTERM
Nov 26 18:22:52 dnsmasq[14609]: started, version 2.72test3 cachesize 1500
Nov 26 18:22:52 dnsmasq[14609]: asynchronous logging enabled, queue limit is 5 messages
Nov 26 18:22:52 dnsmasq-dhcp[14609]: DHCP, IP range 192.168.1.1 -- 192.168.1.128, lease time 1d
Nov 26 18:22:52 dnsmasq-dhcp[14609]: DHCP, sockets bound exclusively to interface br0
Nov 26 18:22:52 dnsmasq[14609]: using local addresses only for domain MerlinASUS
Nov 26 18:22:52 dnsmasq[14609]: read /etc/hosts - 6 addresses
Nov 26 18:22:52 dnsmasq[14609]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:22:52 dnsmasq[14609]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:22:52 dnsmasq-dhcp[14609]: read /etc/ethers - 5 addresses
Nov 26 18:22:52 dnsmasq[14609]: using local addresses only for domain MerlinASUS
Nov 26 18:22:52 dnsmasq[14609]: using nameserver 212.159.6.10#53
Nov 26 18:22:52 dnsmasq[14609]: using nameserver 212.159.6.9#53
Nov 26 18:23:02 rdnssd[14597]: Get IPv6 address & DNS from DHCPv6
Nov 26 18:23:02 rc_service: rc 14630:notify_rc start_dhcp6c
Nov 26 18:23:02 dnsmasq[14609]: read /etc/hosts - 6 addresses
Nov 26 18:23:03 dnsmasq[14609]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:23:03 dnsmasq[14609]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:23:03 dnsmasq-dhcp[14609]: read /etc/ethers - 5 addresses
Nov 26 18:23:03 dnsmasq[14609]: using local addresses only for domain MerlinASUS
Nov 26 18:23:03 dnsmasq[14609]: using nameserver 212.159.6.10#53
Nov 26 18:23:03 dnsmasq[14609]: using nameserver 212.159.6.9#53
Nov 26 18:23:03 rc_service: dhcp6c-state 14634:notify_rc start_radvd
Nov 26 18:23:03 radvd[14635]: version 1.10.0 started
Nov 26 18:23:03 rc_service: dhcp6c-state 14634:notify_rc start_httpd
Nov 26 18:23:03 RT-AC66U: start httpd - SSL
Nov 26 18:24:16 pppd[1065]: System time change detected.
Nov 26 18:24:41 rc_service: service 14651:notify_rc restart_dnsmasq
Nov 26 18:24:41 dnsmasq[14609]: exiting on receipt of SIGTERM
Nov 26 18:24:41 dnsmasq[14654]: started, version 2.72test3 cachesize 1500
Nov 26 18:24:41 dnsmasq[14654]: asynchronous logging enabled, queue limit is 5 messages
Nov 26 18:24:41 dnsmasq-dhcp[14654]: DHCP, IP range 192.168.1.1 -- 192.168.1.128, lease time 1d
Nov 26 18:24:41 dnsmasq-dhcp[14654]: DHCP, sockets bound exclusively to interface br0
Nov 26 18:24:41 dnsmasq[14654]: using local addresses only for domain MerlinASUS
Nov 26 18:24:41 dnsmasq[14654]: read /etc/hosts - 6 addresses
Nov 26 18:24:41 dnsmasq[14654]: read /tmp/mnt/OPTWARE/hosts.clean - 23922 addresses
Nov 26 18:24:41 dnsmasq[14654]: read /etc/hosts.dnsmasq - 5 addresses
Nov 26 18:24:41 dnsmasq-dhcp[14654]: read /etc/ethers - 5 addresses
Nov 26 18:24:41 dnsmasq[14654]: using local addresses only for domain MerlinASUS
Nov 26 18:24:41 dnsmasq[14654]: using nameserver 8.8.8.8#53
Nov 26 18:24:41 dnsmasq[14654]: using nameserver 212.159.6.10#53
Nov 26 18:24:41 dnsmasq[14654]: using nameserver 212.159.6.9#53
2 REPLIES 2
mattturner
Grafter
Posts: 246
Thanks: 2
Registered: ‎25-06-2009

Re: IPv6 packetloss after PPP drop.

Bob saw something very similar a few days ago, I suspect on the same gateway.
I'll take a look into it and try and work out what's going on.
Matt
bobpullen
Community Gaffer
Community Gaffer
Posts: 16,048
Thanks: 3,795
Fixes: 241
Registered: ‎04-04-2007

Re: IPv6 packetloss after PPP drop.

A couple of days ago, I swapped back to my normal username to test something else, which understandably broke my ping monitoring:

Somebody questioned this, and before explaining to them why the graphs were broken I saw this:

I was on pcl-ag06 and had been for over 40 days (according to our RADIUS logs at least).
The problem seems to have started back on the the afternoon of the 24th:

Huh
Edit: I see Matt beat me to it.

Bob Pullen
Plusnet Product Team
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