When I display the routing cache in Linux, using route -C command,
it shows me multiple entries for a given source & destination
address pair.
Source Destination Gateway Flags Metric Ref
Use Iface
172.29.5.150 107.108.204.227 172.29.4.1 0 1
0 eth0
172.29.5.150 107.108.204.227 172.29.4.1 0 0
7 eth0
The first entry has a use count of 0, the second entry has a
usecount of 7 (the actual use count).
My question why does the kernel maintain multiple entries.
My understanding of the algo to update the rtable is ....
every time a packet can't be routed by the information in the
rtable, it uses the Fib & adds this new entry in the rtable.
In my case the rtable already had the first entry,(the one with
use count =0) so when I ping the Linux Mc, it should be able to
route based on the existing information, why add another entry in
rtable ?
Regards,
Hoobastang
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