[Olsr-dev] SmartGateway: 1: no tunnel being set up to SGW server / 2: stale SGW tunnel
Teco Boot
(spam-protected)
Thu Oct 13 21:24:40 CEST 2011
I'm testing SmartGateway on couple of nodes.
Although all user traffic to Internet is OK, I see 2 strange
issues. I use tiny gw script to report status of GW HNAs, default
routes and tunnels.
1) No tunnel at client:
(spam-protected):/usr/local/sbin# gw
Table: Gateways
Status Gateway IP ETX Hopcnt Uplink Downlnk IPv4 IPv6 Prefix
u- 172.31.51.41 1.100 2 120 1000 ipv4(n) - -
u- 172.31.51.44 1.000 1 120 1000 ipv4(n) - -
u- 172.31.175.170 1.000 1 120 1000 ipv4(n) - -
SmartGateway client tunnel:
Default routes:
default via 172.31.51.44 dev wlan0 table 223 metric 4 onlink
SmartGateway server tunnel:
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:172.31.51.42 Mask:255.255.255.255
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Another one:
(spam-protected):/var/log# gw
Table: Gateways
Status Gateway IP ETX Hopcnt Uplink Downlnk IPv4 IPv6 Prefix
u- 172.31.51.41 1.100 2 120 1000 ipv4(n) - -
u- 172.31.51.44 1.000 1 120 1000 ipv4(n) - -
u- 172.31.175.170 1.000 1 120 1000 ipv4(n) - -
SmartGateway client tunnel:
Default routes:
default via 172.31.51.44 dev wlan0 table 223 metric 4 onlink
SmartGateway server tunnel:
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:172.31.175.171 Mask:255.255.255.255
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
This is how it should be:
(spam-protected):~# gw
Table: Gateways
Status Gateway IP ETX Hopcnt Uplink Downlnk IPv4 IPv6 Prefix
u- 172.31.51.41 1.058 1 120 1000 ipv4(n) - -
s- 172.31.51.44 1.000 1 120 1000 ipv4(n) - -
u- 172.31.175.170 1.000 1 120 1000 ipv4(n) - -
SmartGateway client tunnel:
tnl_2c331fac Link encap:IPIP Tunnel HWaddr
inet addr:172.31.175.172 P-t-P:172.31.175.172 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:35123 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:7079418 (6.7 MiB)
Default routes:
default dev tnl_2c331fac table 224 metric 2
default via 172.31.51.44 dev wlan0 table 223 metric 4 onlink
SmartGateway server tunnel:
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:172.31.175.172 Mask:255.255.255.255
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
There is no gateway selected. Other nodes do select a gateway out
of this list (after ~70 seconds after startup).
I have no special warnings on the nodes in error:
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '1' (was 1) to /proc/sys/net/ipv4/ip_forward
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/tunl0/rp_filter
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/send_redirects
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/rp_filter
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/send_redirects
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/rp_filter
Oct 11 11:11:19 AHR-051-042 olsrd[1880]: Adding interface wlan0
Oct 11 11:11:20 AHR-051-042 olsrd[1895]: olsr.org - pre-0.6.3-git_1ffdb71-hash_3c75699de4a7bd0f90a9a15b61076ff2 - successfully started
Oct 11 11:12:30 AHR-051-042 olsrd[1895]: Received netlink error code File exists (-17)
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '1' (was 1) to /proc/sys/net/ipv4/ip_forward
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/tunl0/rp_filter
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/send_redirects
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/rp_filter
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/send_redirects
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/rp_filter
Oct 11 18:53:00 AHR-175-171 olsrd[1974]: Adding interface wlan0
Oct 11 18:53:00 AHR-175-171 olsrd[2000]: Writing "0" to /proc/sys/net/ipv4/conf/bmf0/rp_filter
Oct 11 18:53:00 AHR-175-171 olsrd[2000]: olsr.org - pre-0.6.3-git_1ffdb71-hash_3c75699de4a7bd0f90a9a15b61076ff2 - successfully started
I have the netlink error message on almost all my nodes. Update the message so that it tells us which route is duplicate?
Node without the problem, but with the netlink error:
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '1' (was 1) to /proc/sys/net/ipv4/ip_forward
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/tunl0/rp_filter
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/send_redirects
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/all/rp_filter
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/send_redirects
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Writing '0' (was 1) to /proc/sys/net/ipv4/conf/wlan0/rp_filter
Oct 11 18:22:06 AHR-175-172 olsrd[1950]: Adding interface wlan0
Oct 11 18:22:07 AHR-175-172 olsrd[1965]: Writing "0" to /proc/sys/net/ipv4/conf/bmf0/rp_filter
Oct 11 18:22:07 AHR-175-172 olsrd[1965]: olsr.org - pre-0.6.3-git_1ffdb71-hash_3c75699de4a7bd0f90a9a15b61076ff2 - successfully started
Oct 11 18:23:48 AHR-175-172 olsrd[1965]: Received netlink error code File exists (-17)
Here the routing tables for node AHR-051-042:
(spam-protected):/var/log# olsr -r
HTTP/1.0 200 OK
Content-type: text/plain
Table: Routes
Destination Gateway IP Metric ETX Interface
0.0.0.0/0 172.31.51.44 1 1.000 wlan0
10.51.41.0/24 172.31.51.44 2 1.100 wlan0
10.51.43.0/24 172.31.51.44 3 2.100 wlan0
10.51.44.0/24 172.31.51.44 1 1.000 wlan0
10.51.45.0/24 172.31.51.45 1 1.000 wlan0
10.51.46.0/24 172.31.51.46 1 1.000 wlan0
10.175.170.0/24 172.31.175.170 1 1.000 wlan0
10.175.171.0/24 172.31.175.171 1 1.000 wlan0
10.175.172.0/24 172.31.175.172 1 1.000 wlan0
172.29.51.41/32 172.31.51.44 2 1.100 wlan0
172.29.51.44/32 172.31.51.44 1 1.000 wlan0
172.29.175.170/32 172.31.175.170 1 1.000 wlan0
172.31.51.41/32 172.31.51.44 2 1.100 wlan0
172.31.51.43/32 172.31.51.44 3 2.100 wlan0
172.31.51.44/32 172.31.51.44 1 1.000 wlan0
172.31.51.45/32 172.31.51.45 1 1.000 wlan0
172.31.51.46/32 172.31.51.46 1 1.000 wlan0
172.31.175.170/32 172.31.175.170 1 1.000 wlan0
172.31.175.171/32 172.31.175.171 1 1.000 wlan0
172.31.175.172/32 172.31.175.172 1 1.000 wlan0
(spam-protected):/var/log# ip -4 r s
10.0.0.0/8 via 172.30.0.1 dev tun0
10.51.41.0/24 via 172.31.51.44 dev wlan0 metric 2 onlink
10.51.42.0/25 dev eth0 proto kernel scope link src 10.51.42.1
10.51.43.0/24 via 172.31.51.44 dev wlan0 metric 2 onlink
10.51.44.0/24 via 172.31.51.44 dev wlan0 metric 2 onlink
10.51.45.0/24 via 172.31.51.45 dev wlan0 metric 2 onlink
10.51.46.0/24 via 172.31.51.46 dev wlan0 metric 2 onlink
10.175.170.0/24 via 172.31.175.170 dev wlan0 metric 2 onlink
10.175.171.0/24 via 172.31.175.171 dev wlan0 metric 2 onlink
10.175.172.0/24 via 172.31.175.172 dev wlan0 metric 2 onlink
172.16.0.0/12 via 172.30.0.1 dev tun0
172.29.51.41 via 172.31.51.44 dev wlan0 metric 2 onlink
172.29.51.44 via 172.31.51.44 dev wlan0 metric 2 onlink
172.29.175.170 via 172.31.175.170 dev wlan0 metric 2 onlink
172.30.0.0/16 dev tun0 proto kernel scope link src 172.30.0.39
172.31.0.0/16 dev wlan0 proto kernel scope link src 172.31.51.42
172.31.51.41 via 172.31.51.44 dev wlan0 metric 2 onlink
172.31.51.43 via 172.31.51.44 dev wlan0 metric 2 onlink
172.31.51.44 via 172.31.51.44 dev wlan0 metric 2 onlink
172.31.51.45 via 172.31.51.45 dev wlan0 metric 2 onlink
172.31.51.46 via 172.31.51.46 dev wlan0 metric 2 onlink
172.31.175.170 via 172.31.175.170 dev wlan0 metric 2 onlink
172.31.175.171 via 172.31.175.171 dev wlan0 metric 2 onlink
172.31.175.172 via 172.31.175.172 dev wlan0 metric 2 onlink
192.168.0.0/16 via 172.30.0.1 dev tun0
(spam-protected):/var/log# ip -4 r s tab 223
default via 172.31.51.44 dev wlan0 metric 4 onlink
(spam-protected):/var/log# ip -4 r s tab 224
====
2) Tunnel to another SGW server while router is SGW server itself:
(spam-protected):~# gw
Table: Gateways
Status Gateway IP ETX Hopcnt Uplink Downlnk IPv4 IPv6 Prefix
u- 172.31.51.41 1.000 1 120 1000 ipv4(n) - -
s- 172.31.51.44 1.000 1 120 1000 ipv4(n) - -
SmartGateway client tunnel:
tnl_2c331fac Link encap:IPIP Tunnel HWaddr
inet addr:172.31.175.170 P-t-P:172.31.175.170 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Default routes:
default dev tnl_2c331fac table 224 metric 2
default via 10.22.190.200 dev eth1
SmartGateway server tunnel:
tunl0 Link encap:IPIP Tunnel HWaddr
inet addr:172.31.175.170 Mask:255.255.255.255
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:137 (137.0 B) TX bytes:0 (0.0 B)
I think it is better to clean up the stale tunnel. But it doesn't hurt.
Teco
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