Q: Why do we have to create the
/dev/mipv6_dev entry?
A: The dev file is mainly so that the userspace tool,
mipdiag, can make modifications to the kernel parameters using
ioctl calls through the device file. mknod creates the special
device file with paramters recognizable by the mobile-ip6
module.
Q: Does MIPL support
IPSec?
A: There is no support IPSec on 2.4.x. MIPL for 2.6 series will
have IPSec support from the start. You may use a third-party IPSec
implementation.
Q: How can I control the type of routing used for
communication between the MN and a CN (through HA tunnel or by
direct communication using binding update/acks)?
A: You can control this through:
/proc/sys/conf/net/ipv6/mobility/accept_return_routability
If you do not want to use return routability and route optimization,
set it to 0 with:
# echo 0 >
/proc/sys/..../accept_return_routability
Then MN will communicate with CNs only through the
home tunnel.
Q: Can different wireless networks
have different ESSIDs/WEP keys?
A: Yes, but you must change this upon arrival to the new
network. MIPv6 from MIPL can't do this automatically.
Q: Host B has two interfaces with two
different subnets assigned. When I ping B from host A, it does
not answer! Why not? Host A knows where host B
(subnets) are!
A: The host B doesn't know where host A is (B doesn't
know where A's net is), so you must add a route
entry:
# ip route add fec0:106:2700::/64 via fec0:106:2300::1
or
# route -A inet6 add fec0:106:2700::/64 gw fec0:106:2300::1 dev eth0
Q: How do I set a default gateway in
IPv6?
A: You do that using the traditional "route" or the newer
"IP" command:
# ip route ::/0 via <ipv6-host>
# route -A inet6 add default gw <ipv6-host>
Q: Why does the host send a multicast
address rather than an anycast address, requesting for router
solicitation?
A: Because the host wants an answer from every router, not from just any
router. The idea is to be able to get all parameters and to choose
the "best" default router.
Q: Why doesn't MN notice that it has
moved?
A: It thinks that it's previous router is still reachable. This may
result from very large lifetimes in router advertisements. Check the
configuration of the program sending router advertisements in the
router. If the program supports router advertisement intervals, you
can use this to help MN in movement detection by setting the use of
interval to on. See man radvd.conf for
details.
