On Tue, 2007-07-24 at 10:13 -0700, Rick Jones wrote: > > Rick, > > > > I don't see any way around this. For example, on one of my test > > systems, I have the following link local routes: > > > > chance% netstat -A inet6 -rn | grep fe80::/64 > > fe80::/64 :: > > U 256 0 0 eth0 > > fe80::/64 :: > > U 256 0 0 eth2 > > fe80::/64 :: > > U 256 0 0 eth3 > > fe80::/64 :: > > U 256 0 0 eth4 > > fe80::/64 :: > > U 256 0 0 eth5 > > fe80::/64 :: > > U 256 0 0 eth6 > > > > So if I want to run a link local test to fe80::202:b3ff:fed4:cd1, > > the system has no way to choose which is the correct interface to > > use for the test, and will give an error if the interface isn't > > specified. > > Yeah, I was wondering about that. I'm not sure if the attempts on "those > other > OSes" happened to involve multiple interfaces or not. Even so, it "feels" > unpleasant for an application to deal with and I wonder if there is a way for > a > stack to deal with it on the application's behalf. I guess that might > involve > some sort of layer violation between neightbor discovery and routing (typing > while I think about things I know little about...) > > Is there RFC chapter and verse I might read about routing with multiple > link-local's on a system? > > > You must explicitly specify the desired interface. For example, > > on my test system, the correct interface is eth6 which is interface 8 > > (lo eth0 eth1 eth2 ... eth5 eth6). Here is an example nuttcp test > > specifying interface 8: > > > > chance% nuttcp -P5100 fe80::202:b3ff:fed4:cd1%8 > > 1178.5809 MB / 10.02 sec = 986.2728 Mbps 12 %TX 15 %RX > > > > nuttcp uses getaddrinfo() which parses the "%<ifindex>" field, > > and then copies the sin6_scope_id from the res structure to the > > server's sockaddr_in6 structure before initiating the connect(). > > OK, I'll give that a quick try with netperf: > > [EMAIL PROTECTED] ~]# netperf -H 192.168.2.107 -c -C -i 30,3 -- -s 1M -S 1M > -m 64K > -H fe80::207:43ff:fe05:9d%2
We can even specify the interface name instead of the interface index <link-local>%ethX getaddrinfo() uses if_nametoindex() internally to get the index. Thanks Sridhar > TCP STREAM TEST from ::0 (::) port 0 AF_INET6 to fe80::207:43ff:fe05:9d%2 > (fe80::207:43ff:fe05:9d) port 0 AF_INET6 : +/-2.5% @ 99% conf. > > Cool - it establishes the data connection just fine. > > > To further demonstrate my ignorance :) is that %n suffix something one might > expect in most/all getaddrinfo()'s or is that unique to the one in Linux? > > rick jones > - > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
