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07-01-2012 09:19 AM
07-01-2012 09:19 AM
[A-series] LACP over VPLS?
Hello,
is LACP over multiple VPLS instances supported on Comware?
e.g. imagine a IRF stack of two switches, which you would like to connect with each other (see picture)
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07-03-2012 08:32 PM
07-03-2012 08:32 PM
Re: [A-series] LACP over VPLS?
Do the VPLS circuits appear as layer 2 links? If so, i would definitely try and see how it goes.
Paul
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07-09-2012 06:34 AM
07-09-2012 06:34 AM
Re: [A-series] LACP over VPLS?
In my opinion and my knowledge of VPLS, it should work. But I had never tried it out.
br
Manuel
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01-09-2013 07:10 AM
01-09-2013 07:10 AM
Re: [A-series] LACP over VPLS?
Hi,
LACP uses the ethernet link-local range 01:80:C2 (just like 802.1x, lldp, stp etc), so most intelligent switches will drop packets from this range.
When you are using comware devices for the VPLS setup, (or a QinQ setup would be similar), you can configure the PE devices with bpdu-tunneling.
When the CE device sends an LACP packet, the PE device with bpdu-tunnel feature will re-write the dstmac to a custom dstmac, so it can safely pass the backbone. The remote PE device will again re-write the dstmac to the original protocol dstmac (01:80:C2:xx:xx:xx), so the remote device on the VPLS link would not see the difference.
You may want to configure the IRF devices with the "lacp period short" command, to detect any cloud failures faster than the default 90sec lacp timeout.
Other suggestion would be to enable OAM on the interfaces, which is some kind of BFD (hello exchange) between the 2 CE (the IRF switches in your picture) devices, which will be able to detect a VPLS failure in about 1 sec.
Best regards,Peter.
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01-09-2013 07:55 AM
01-09-2013 07:55 AM
Re: [A-series] LACP over VPLS?
Michael
Me too, you should read my post here:
In my experience, dynamic lag will not work because BPDU drop; static lag works, but if any of your VPLS not working your switch still forwarding packets to that links and data lost will occur
TN
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