Thanks a lot, Ben [?]
On Fri, Jul 27, 2012 at 1:27 PM, Ben Pfaff <[email protected]> wrote: > On Fri, Jul 27, 2012 at 11:00:35AM +0800, Kris zhang wrote: > > Hi > > > > I have a question about RSPAN, so i only find the following descriptin in > > vsctl manual page: > > > > *Port Mirroring* > > *Mirror all packets received o r sent on eth0 or eth1 onto eth2, assuming > > that all of those ports exist on* > > *bridge br0 (as a side-effect this causes any packets received on eth2 to > > be ignored):* > > *ovs-vsctl -- set Bridge br0 mirrors=@m \* > > *-- --id=@eth0 get Port eth0 \* > > *-- --id=@eth1 get Port eth1 \* > > *-- --id=@eth2 get Port eth2 \* > > *-- --id=@m create Mirror name=mymirror select-dst-port=@eth0,@eth1 > > select-srcport=@eth0,@eth1 output-port=@eth2* > > > > there is no any vlan in above command, and in ovs-vswitchd.conf.db.5, > there > > is an *output_vlan* in mirror table, but i still confuse how to setup > > RSPAN, so could u please give me a simple example? > > Q: How do I configure a VLAN as an RSPAN VLAN, that is, enable > mirroring of all traffic to that VLAN? > > A: The following commands configure br0 with eth0 as a trunk port and > tap0 as an access port for VLAN 10. All traffic coming in or going > out on tap0, as well as traffic coming in or going out on eth0 in > VLAN 10, is also mirrored to VLAN 15 on eth0: > > ovs-vsctl add-br br0 > ovs-vsctl add-port br0 eth0 > ovs-vsctl add-port br0 tap0 tag=10 > ovs-vsctl \ > -- --id=@m create mirror name=m0 select-vlan=10 output-vlan=15 \ > -- set bridge br0 mirrors=@m > > (If you omit select-vlan=10, then all traffic on any VLAN, except > VLAN 15, will be mirrored to VLAN 15. This is possibly confusing > because the packets' original VLANs cannot be determined.) > > To later disable mirroring, run: > > ovs-vsctl clear bridge br0 mirrors > > Mirroring to a VLAN can disrupt a network that contains unmanaged > switches. See ovs-vswitchd.conf.db(5) for details. Mirroring to a > GRE tunnel has fewer caveats than mirroring to a VLAN and should > generally be preferred. >
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