IPv6 routing (long)
paul van den bergen
pvandenbergen at swin.edu.au
Wed Nov 5 16:48:52 PST 2003
On Fri, 31 Oct 2003 04:20 pm, Bruce A. Mah wrote:
> If memory serves me right, paul van den bergen wrote:
> > I am attempting to set up some static ipv6 routes on my little network.
> >
> > example:
> >
> > box1 - fec0:0:0:1::1 -------- fec0:0:0:1::2 - box 2 (router) -
> > fec0:0:0:2::1 -------- fec0:0:0:2::2 - box 3
> >
> > I want to reach from box 1 to box 3
> >
> > no route6d or anything... this is a really simple network.
> >
> > sysctl net.inet6.ip6.forwarding=1, net.inet6.ip6.accept_rtadv=0 on box 2
> > (the
> >
> > router)
> > sysctl net.inet6.ip6.forwarding=0, net.inet6.ip6.accept_rtadv=1 on boxes
> > 1 an d
> > 3 (the hosts).
> >
> > route add -inet6 -net fec0:0:0:2:: -prefixlen 64 -host fec0:0:0:1::2
> > on box1
> >
> > box2 can ping6 to box1 and box3 and vise versa.
> >
> > why can't box 1 ping6 box 3? What have I missed?
>
> Did you add a route on box3 so that it can reach box1? Remember that
> ping6 requires two-way connectivity.
Oh. I just realised that I didn't add a route on box3 to reach box1...
thank you, I shall try that.
nup, didn't help
> You set net.inet6.ip6.accept_rtadv=1 on the end hosts...do you have
> rtadvd running on box2 so that they actually acquire the routes?
um... if I'm setting up static routes (e.g. no routing software oin box 2),
isn't this pointless? see below...
static routes.
I imagine that if I do;
on box1
route add -inet6 -net fec0:0:0:2:: -prefixlen 64 -host fec0:0:0:1::2
on box3
route add -inet6 -net fec0:0:0:1:: -prefixlen 64 -host fec0:0:0:2::1
and on box 2
sysctl net.inet6.ip6.forwarding=1
I shouldn't need anything else
or rather, should I need something else?
if I do the same experiment but with IPv4, I also do not get connectivity from
box 1 to box 3, so obviously something is missing...
what am I missing?
additional questions:
what is rtadvd and what role does it play? does it get activated by other
daemons or is it to be explicitly called by the user?
if I used routing software on box 2, what _else_ would I need to configure?
is there a clash between sysctl settings for net.inet6.ip6.forwarding and
net.inet6.ip6.accept_rtadvt?
> You haven't really provided enough information to debug the problem. How
> about the output of ifconfig(8) and the routing tables on all three
> machines?
>
> Bruce.
sorry, I should have done that. partly I didn't really know what was
relevent... still don't, but here goes...
note:
network between box 1-2 = fec0:0:0:229
network between box 2-3 = fec0:0:0:10
netstat -rn output
box1:
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 136.186.229.1 UGSc 2 2073 vr0
127.0.0.1 127.0.0.1 UH 2 18 lo0
136.186.229/24 link#1 UC 3 0 vr0
136.186.229.1 link#1 UHLW 1 0 vr0
136.186.229.26 00:08:74:df:70:3e UHLW 1 147 vr0 1108
192.168.2 link#1 UC 1 0 vr0
192.168.2.101 00:40:63:cb:56:e6 UHLW 0 2 vr0 300
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRSc lo0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRSc lo0
fe80::/10 ::1 UGRSc lo0
fe80::%vr0/64 link#1 UC vr0
fe80::240:63ff:fecb:c3d1%vr0 00:40:63:cb:c3:d1 UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#8 UHL lo0
fec0:0:0:229:: 00:40:63:cb:c3:d1 UHL lo0 =>
fec0:0:0:229::/64 link#1 UC vr0
fec0::229:240:63ff:fecb:c3d1 00:40:63:cb:c3:d1 UHL lo0
ff01::%vr0/32 link#1 UC vr0
ff01::%lo0/32 ::1 UC lo0
ff02::/16 ::1 UGRS lo0
ff02::%vr0/32 link#1 UC vr0
ff02::%lo0/32 ::1 UC lo0
box2:
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
127.0.0.1 127.0.0.1 UH 1 18 lo0
136.186.229/24 link#1 UC 2 0 vr0
136.186.229.26 00:08:74:df:70:3e UHLW 1 1951 vr0 1175
192.168.1 link#10 UC 1 0 wi0
192.168.1.104 00:09:7c:85:82:74 UHLW 0 36 wi0 543
192.168.2 link#1 UC 1 0 vr0
192.168.2.103 00:40:63:cb:c3:d1 UHLW 0 2 vr0 367
Internet6:
Destination Gateway Flags Netif Expire
::1 ::1 UH lo0
fe80::%vr0/64 link#1 UC vr0
fe80::240:63ff:fecb:56e6%vr0 00:40:63:cb:56:e6 UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#8 UHL lo0
fe80::%wi0/64 link#10 UC wi0
fe80::230:abff:fe20:a24c%wi0 00:30:ab:20:a2:4c UHL lo0
fec0:0:0:10:: 00:30:ab:20:a2:4c UHL lo0 =>
fec0:0:0:10::/64 link#10 UC wi0
fec0::10:209:7cff:fe85:8274 00:09:7c:85:82:74 UHLW wi0
fec0::10:230:abff:fe20:a24c 00:30:ab:20:a2:4c UHL lo0
fec0:0:0:229:: 00:40:63:cb:56:e6 UHL lo0 =>
fec0:0:0:229::/64 link#1 UC vr0
fec0::229:240:63ff:fecb:56e6 00:40:63:cb:56:e6 UHL lo0
ff01::%vr0/32 link#1 UC vr0
ff01::%lo0/32 ::1 UC lo0
ff01::%wi0/32 link#10 UC wi0
ff02::%vr0/32 link#1 UC vr0
ff02::%lo0/32 ::1 UC lo0
ff02::%wi0/32 link#10 UC wi0
box3:
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 136.186.229.1 UGSc 2 2003 vr0
127.0.0.1 127.0.0.1 UH 2 18 lo0
136.186.229/24 link#1 UC 3 0 vr0
136.186.229.1 00:00:0c:07:ac:e5 UHLW 1 0 vr0 1061
136.186.229.26 00:08:74:df:70:3e UHLW 1 947 vr0 962
192.168.1 link#11 UC 1 0 an0
192.168.1.101 00:30:ab:20:a2:4c UHLW 0 27 an0 330
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRSc lo0
::1 link#5 UHL lo0
::ffff:0.0.0.0/96 ::1 UGRSc lo0
fe80::/10 ::1 UGRSc lo0
fe80::%vr0/64 link#1 UC vr0
fe80::240:63ff:fecb:56eb%vr0 00:40:63:cb:56:eb UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#5 UHL lo0
fe80::%an0/64 link#11 UC an0
fe80::209:7cff:fe85:8274%an0 00:09:7c:85:82:74 UHL lo0
fec0:0:0:10:: 00:09:7c:85:82:74 UHL lo0 =>
fec0:0:0:10::/64 link#11 UC an0
fec0::10:209:7cff:fe85:8274 00:09:7c:85:82:74 UHL lo0
fec0::10:230:abff:fe20:a24c 00:30:ab:20:a2:4c UHLW an0
ff01::%vr0/32 link#1 UC vr0
ff01::%lo0/32 ::1 UC lo0
ff01::%an0/32 link#11 UC an0
ff02::/16 ::1 UGRS lo0
ff02::%vr0/32 link#1 UC vr0
ff02::%lo0/32 ::1 UC lo0
ff02::%an0/32 link#11 UC an0
ifconfig output.
box1:
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 136.186.229.57 netmask 0xffffff00 broadcast 136.186.229.255
inet6 fe80::240:63ff:fecb:c3d1%vr0 prefixlen 64 scopeid 0x1
inet6 fec0::229:240:63ff:fecb:c3d1 prefixlen 64
inet6 fec0:0:0:229:: prefixlen 64 anycast
inet 192.168.2.103 netmask 0xffffff00 broadcast 192.168.2.255
ether 00:40:63:cb:c3:d1
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500
gif0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 1280
pflog0: flags=0<> mtu 33216
pfsync0: flags=0<> mtu 1896
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x8
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
box2
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 136.186.229.55 netmask 0xffffff00 broadcast 136.186.229.255
inet6 fe80::240:63ff:fecb:56e6%vr0 prefixlen 64 scopeid 0x1
inet6 fec0::229:240:63ff:fecb:56e6 prefixlen 64
inet6 fec0:0:0:229:: prefixlen 64 anycast
inet 192.168.2.101 netmask 0xffffff00 broadcast 192.168.2.255
ether 00:40:63:cb:56:e6
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500
gif0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 1280
pflog0: flags=0<> mtu 33216
pfsync0: flags=0<> mtu 1896
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x8
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
wi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::230:abff:fe20:a24c%wi0 prefixlen 64 scopeid 0xa
inet6 fec0:0:0:10:: prefixlen 64 anycast
inet6 fec0::10:230:abff:fe20:a24c prefixlen 64
inet 192.168.1.101 netmask 0xffffff00 broadcast 192.168.1.255
ether 00:30:ab:20:a2:4c
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid MAGIC 1:MAGIC
stationname HomeNet
channel 1 authmode OPEN powersavemode OFF powersavesleep 100
wepmode OFF weptxkey 1
box3
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 136.186.229.58 netmask 0xffffff00 broadcast 136.186.229.255
inet6 fe80::240:63ff:fecb:56eb%vr0 prefixlen 64 scopeid 0x1
ether 00:40:63:cb:56:eb
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
pflog0: flags=0<> mtu 33216
pfsync0: flags=0<> mtu 1896
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
hif0: flags=8800<SIMPLEX,MULTICAST> mtu 1280
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500
gif0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 1280
an0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fec0:0:0:10:: prefixlen 64 anycast
inet6 fe80::209:7cff:fe85:8274%an0 prefixlen 64 scopeid 0xb
inet6 fec0::10:209:7cff:fe85:8274 prefixlen 64
inet 192.168.1.104 netmask 0xffffff00 broadcast 192.168.1.255
ether 00:09:7c:85:82:74
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid MAGIC 1:MAGIC
stationname MobileNode
channel 1 authmode OPEN powersavemode OFF powersavesleep 200
wepmode OFF weptxkey 1
note that there is an AP (linksys WAP 11 ver 2.2) connecting the two wifi
cards. I can get the same connectivity using adhoc mode.
sysctl settings... (culled to most interesting... or not clearly irrelevent
anyway.)
box1
net.inet.ip.forwarding: 0
net.inet.ip.redirect: 1
net.inet.ip.sourceroute: 0
net.inet.ip.accept_sourceroute: 0
net.inet.ip.fastforwarding: 0
net.inet.ip.keepfaith: 0
net.inet.ip.subnets_are_local: 0
net.inet.ip.sendsourcequench: 0
net.inet.ip.check_interface: 0
net.inet6.ip6.forwarding: 0
net.inet6.ip6.redirect: 1
net.inet6.ip6.accept_rtadv: 0
net.inet6.ip6.keepfaith: 0
net.inet6.ip6.dad_count: 1
net.inet6.ip6.use_deprecated: 1
net.inet6.ip6.rr_prune: 5
net.inet6.ip6.v6only: 0
net.inet6.ip6.use_tempaddr: 0
net.inet6.ip6.auto_linklocal: 1
net.inet6.ip6.prefer_tempaddr: 0
net.inet6.ip6.use_defaultzone: 0
box2
net.inet.ip.forwarding: 1
net.inet.ip.redirect: 1
net.inet.ip.sourceroute: 0
net.inet.ip.accept_sourceroute: 0
net.inet.ip.fastforwarding: 0
net.inet.ip.keepfaith: 0
net.inet.ip.subnets_are_local: 0
net.inet.ip.sendsourcequench: 0
net.inet.ip.check_interface: 0
net.inet6.ip6.forwarding: 1
net.inet6.ip6.redirect: 1
net.inet6.ip6.accept_rtadv: 0
net.inet6.ip6.keepfaith: 0
net.inet6.ip6.dad_count: 1
net.inet6.ip6.use_deprecated: 1
net.inet6.ip6.rr_prune: 5
net.inet6.ip6.v6only: 0
net.inet6.ip6.use_tempaddr: 0
net.inet6.ip6.auto_linklocal: 1
net.inet6.ip6.prefer_tempaddr: 0
net.inet6.ip6.use_defaultzone: 0
box3
net.inet.ip.forwarding: 0
net.inet.ip.redirect: 1
net.inet.ip.sourceroute: 0
net.inet.ip.accept_sourceroute: 0
net.inet.ip.fastforwarding: 0
net.inet.ip.keepfaith: 0
net.inet.ip.subnets_are_local: 0
net.inet.ip.sendsourcequench: 0
net.inet.ip.check_interface: 0
net.inet6.ip6.forwarding: 0
net.inet6.ip6.redirect: 1
net.inet6.ip6.accept_rtadv: 0
net.inet6.ip6.keepfaith: 0
net.inet6.ip6.dad_count: 1
net.inet6.ip6.use_deprecated: 1
net.inet6.ip6.rr_prune: 5
net.inet6.ip6.v6only: 0
net.inet6.ip6.use_tempaddr: 0
net.inet6.ip6.auto_linklocal: 1
net.inet6.ip6.prefer_tempaddr: 0
net.inet6.ip6.use_defaultzone: 0
kldstat outputs something like
Id Refs Address Size Name
1 3 0xc0100000 4b1480 kernel
2 1 0xc140b000 7000 linprocfs.ko
3 1 0xc1497000 15000 linux.ko
on all the boxes...
i.e. no bridging.
network maps:
IPv6:
box1
|
vr0
|
fec0::229:240:63ff:fecb:c3d1
|
|
fec0:0:0:229::/64
|
|
fec0::229:240:63ff:fecb:56e6
|
vr0
|
box2
|
wi0
|
fec0::10:230:abff:fe20:a24c
|
|
fec0:0:0:10::/64
|
|
fec0::10:209:7cff:fe85:8274
|
an0
|
box3
IPv4:
box1
|
vr0
|
192.168.2.103
|
|
192.168.2.0/24
|
|
192.168.2.101
|
vr0
|
box2
|
wi0
|
192.168.1.101
|
|
192.168.1.0/24
|
|
192.168.1.104
|
an0
|
box3
ping behaviour:
box2.wi0 -> box3.an0
IPv4:
ping 192.168.1.104
PING 192.168.1.104 (192.168.1.104): 56 data bytes
64 bytes from 192.168.1.104: icmp_seq=0 ttl=64 time=4.178 ms
64 bytes from 192.168.1.104: icmp_seq=1 ttl=64 time=4.201 ms
64 bytes from 192.168.1.104: icmp_seq=2 ttl=64 time=3.669 ms
^C
--- 192.168.1.104 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 3.669/4.016/4.201/0.246 ms
box2.vr0 -> box1.vr0
IPv4:
ping 192.168.2.103
PING 192.168.2.103 (192.168.2.103): 56 data bytes
64 bytes from 192.168.2.103: icmp_seq=0 ttl=64 time=0.364 ms
64 bytes from 192.168.2.103: icmp_seq=1 ttl=64 time=0.157 ms
64 bytes from 192.168.2.103: icmp_seq=2 ttl=64 time=0.133 ms
^C
--- 192.168.2.103 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.133/0.218/0.364/0.104 ms
box1.vr0 -> box3.an0
ping 192.168.1.104
PING 192.168.1.104 (192.168.1.104): 56 data bytes
^C
--- 192.168.1.104 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
IPv6:
box2.wi0 -> box3.an0
ping6 fec0::10:209:7cff:fe85:8274
PING6(56=40+8+8 bytes) fec0::10:230:abff:fe20:a24c -->
fec0::10:209:7cff:fe85:8274
16 bytes from fec0::10:209:7cff:fe85:8274, icmp_seq=0 hlim=64 time=3.546 ms
16 bytes from fec0::10:209:7cff:fe85:8274, icmp_seq=1 hlim=64 time=3.785 ms
16 bytes from fec0::10:209:7cff:fe85:8274, icmp_seq=2 hlim=64 time=4.368 ms
^C
--- fec0::10:209:7cff:fe85:8274 ping6 statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 3.546/3.900/4.368/0.345 ms
box2.vr0 -> box1.vr0
ping6 fec0::229:240:63ff:fecb:c3d1
PING6(56=40+8+8 bytes) fec0::229:240:63ff:fecb:56e6 -->
fec0::229:240:63ff:fecb:c3d1
16 bytes from fec0::229:240:63ff:fecb:c3d1, icmp_seq=0 hlim=64 time=0.528 ms
16 bytes from fec0::229:240:63ff:fecb:c3d1, icmp_seq=1 hlim=64 time=0.228 ms
16 bytes from fec0::229:240:63ff:fecb:c3d1, icmp_seq=2 hlim=64 time=0.216 ms
^C
--- fec0::229:240:63ff:fecb:c3d1 ping6 statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.216/0.324/0.528/0.144 ms
box1.vr0 -> box3.an0
ping6 fec0::10:209:7cff:fe85:8274
ping6: UDP connect: No route to host
AP setup screen (from lynx)
SETUP
This screen contains all of the AP's basic setup functions. Most users will
be able to use the AP's default settings without making any changes. If you
require help during configuration, please see the user guide.
Firmware Version: 1.009
AP Name: MAGIC home AP_______
LAN IP Address: (MAC Address: 00-06-25-54-23-8E )
( ) Obtain an IP Address Automatically
(*) Specify an IP Address
192 . 168 . 1__ . 254
Subnet Mask:
255 . 255 . 255 . 0__
Gateway:
0__ . 0__ . 0__ . 0__
Wireless:
(MAC Address: 00-06-25-53-3F-8C )
SSID: MAGIC_______________
Channel: [1_] (Domain: USA )
WEP: ( ) Mandatory (*) Disable [BUTTON]
AP
Mode:
(*) Access Point
( ) Access Point Client Remote AP MAC Address _____________
( ) Wireless Bridge Remote Bridge MAC Address _____________
( ) Wireless Bridge - Point to MultiPoint
When set to "Access Point Client", "Wireless Bridge" or "Wireless
Bridge
-
Point to MultiPoint" mode, the device will only communicate with another
WAP 11 ver. 2.2 or WAP 11.
dstumbler view of the AP
[ 1] MAGIC (00:06:25:54:23:8e) bn019:046:027
SSID: MAGIC
BSSID:00:06:25:54:23:8e
Mfg: N/A
Channel: 1 11.0/100
Signal/Noise: 19/46/27
First Seen: 0:14:40
Last Seen: 0:15:24
022:049:027 ----------+++++++++
021:048:027 ----------++++++++
022:049:027 ----------+++++++++
019:046:027 ----------+++++++
022:049:027 ----------+++++++++
021:048:027 ----------++++++++
021:048:027 ----------++++++++
021:048:027 ----------++++++++
020:047:027 ----------++++++++
021:048:027 ----------++++++++
021:048:027 ----------++++++++
020:047:027 ----------++++++++
019:046:027 ----------+++++++
021:048:027 ----------++++++++
020:047:027 ----------++++++++
021:048:027 ----------++++++++
021:048:027 ----------++++++++
021:048:027 ----------++++++++
020:047:027 ----------++++++++
022:049:027 ----------+++++++++
022:049:027 ----------+++++++++
019:046:027 ----------+++++++
022:049:027 ----------+++++++++
019:046:027 ----------+++++++
have tested this in adhoc mode and works just as described above, so that is
not the problem...
--
Dr Paul van den Bergen
Centre for Advanced Internet Architectures
caia.swin.edu.au
pvandenbergen at swin.edu.au
IM:bulwynkl2002
"And some run up hill and down dale, knapping the chucky stones
to pieces wi' hammers, like so many road makers run daft.
They say it is to see how the world was made."
Sir Walter Scott, St. Ronan's Well 1824
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