[Olsr-dev] Seeking comments: OLSR+ETX v/s DSR+ETX
Wed Dec 19 13:05:23 CET 2007
two more points, while we are at the "basics track"...
For ETT we need a round trip time to calculate. To measure/evaluate the RTT
difference between large and small packets. So basically, you will send out
a packet and listen for the answer, checking the time. Why not combine this
with a firewall/forward check"? Example: The package is unicast. And has the
IP addr of the sending node as destination and the dest-MAC addr of the
receiving node. If it does not come back, the node is misconfigured, a
lazybone, [...] and should be ignored. Requires some low-level hacks to send
out such a packet...
For gateways to other routing domains (aka "Internet Gateway"), you do not
receive ETT / LQ measurements from the link neighbour. Because the other
side does not run a compatible routing daemon. There should be a way to
configure such a value manually or evaluate it out-of-protocol (e.g. by
switching measurements to ICMP echo requests).
Hope it's not too unreflected and understandable...
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