Difference between revisions of "IPv6 Route: FAQ IPv6 Route"
Onnowpurbo (talk | contribs) (New page: 7.6. FAQ for IPv6 routes 7.6.1. Support of an IPv6 default route One idea of IPv6 was a hierachical routing, therefore only less routing entries are needed in routers. There are some iss...) |
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7.6. FAQ for IPv6 routes | 7.6. FAQ for IPv6 routes | ||
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| + | ==Dukungan untuk route default IPv6== | ||
One idea of IPv6 was a hierachical routing, therefore only less routing entries are needed in routers. | One idea of IPv6 was a hierachical routing, therefore only less routing entries are needed in routers. | ||
There are some issues in current Linux kernels: | There are some issues in current Linux kernels: | ||
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7.6.1.1. Clients (not routing any packet!) | 7.6.1.1. Clients (not routing any packet!) | ||
Client can setup a default route like prefix “::/0”, they also learn such route on autoconfiguration e.g. using radvd on the link like following example shows: | Client can setup a default route like prefix “::/0”, they also learn such route on autoconfiguration e.g. using radvd on the link like following example shows: | ||
| − | # ip -6 route show | grep ^default | + | # ip -6 route show | grep ^default |
| − | default via fe80::212:34ff:fe12:3450 dev eth0 proto kernel metric 1024 expires | + | default via fe80::212:34ff:fe12:3450 dev eth0 proto kernel metric 1024 expires 29sec mtu 1500 advmss 1440 |
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7.6.1.2. Routers in case of packet forwarding | 7.6.1.2. Routers in case of packet forwarding | ||
Revision as of 08:13, 23 May 2013
7.6. FAQ for IPv6 routes
Dukungan untuk route default IPv6
One idea of IPv6 was a hierachical routing, therefore only less routing entries are needed in routers.
There are some issues in current Linux kernels:
7.6.1.1. Clients (not routing any packet!)
Client can setup a default route like prefix “::/0”, they also learn such route on autoconfiguration e.g. using radvd on the link like following example shows:
# ip -6 route show | grep ^default default via fe80::212:34ff:fe12:3450 dev eth0 proto kernel metric 1024 expires 29sec mtu 1500 advmss 1440
7.6.1.2. Routers in case of packet forwarding
Older Linux kernel (at least <= 2.4.17) don't support default routes. You can set them up, but the route lookup fails when a packet should be forwarded (normal intention of a router). If you're still using such older kernel, “default routing” can be setup using the currently used global address prefix “2000::/3”.
Note: take care about default routing without address filtering on edge routers. Otherwise unwanted multicast or site-local traffic can leave the edge.