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| Igor Mamuziæ aka Pseto... |
 Posted: Mon Oct 19, 2009 5:20 pm |
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I wonder if PAGP/LACP constantly exchanging PDUs between peers or only
during negotiation phase? I would like to aggregate 8 ports between c4500
chassis and 2960 switches, but optical-udp media converters are in use for
the links. If I just make fixed configuration putting ports in etherchanell
group then I have a problem with end to end link failure detection. So,
maybe if I use dynamic port channel configuration with PAgP or LACP maybe
I'll get port aggregation and end to end failure detection. Right? I ask
because at this moment I don't have equipment to conduct some lab tests
about this.
Igor |
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| bod43... |
| Posted: Wed Oct 21, 2009 8:18 pm |
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On 19 Oct, 14:20, "Igor Mamuziæ aka Pseto" <igor.mamuzicMAKNI_... at (no spam) zg.t-
com.hr> wrote:
Quote: I wonder if PAGP/LACP constantly exchanging PDUs between peers or only
during negotiation phase? I would like to aggregate 8 ports between c4500
chassis and 2960 switches, but optical-udp media converters are in use for
the links. If I just make fixed configuration putting ports in etherchanell
group then I have a problem with end to end link failure detection. So,
maybe if I use dynamic port channel configuration with PAgP or LACP maybe
I'll get port aggregation and end to end failure detection. Right? I ask
because at this moment I don't have equipment to conduct some lab tests
about this.
I don't know the answer to your questions however -
If your platform supports it you should
be able to use UDLD to force the interfaces down in
the event that you suffer any link failures. UDLD uses
L2 packets (same dest mac as CDP).
LACP is 801.3ad and you can get the full spec from
the IEEE. Some of the more common IEEE networking
specifications are available for free download.
Some media convertors pass through the link
state so you may have no problem at all if you
configure the converter correctly.
My guess is that pagp and lcap exchange packets on
a regular basis but I don't know. debug pagp/lacp? |
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| Igor Mamuzic aka Pseto... |
| Posted: Thu Oct 22, 2009 4:17 pm |
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"bod43" <Bod43 at (no spam) hotmail.co.uk> wrote in message
news:99920b55-1b64-49d8-a2f4-7a461cf297ae at (no spam) l34g2000vba.googlegroups.com...
Quote: I don't know the answer to your questions however -
If your platform supports it you should
be able to use UDLD to force the interfaces down in
the event that you suffer any link failures. UDLD uses
L2 packets (same dest mac as CDP).
UDLD isn't my way to go because I need to aggregate links for the load
balancing sake first and then ensure end-to-end link failure detection. I'm
not sure if UDLD can be enabled on channel ports or maybe only physical
ports are supported?
Quote: Some media convertors pass through the link
state so you may have no problem at all if you
configure the converter correctly.
Converters with which I have to deal here are non-manageable Planet dummy
convertors:( and they cannot pass trough link state...
Quote: My guess is that pagp and lcap exchange packets on
a regular basis but I don't know. debug pagp/lacp?
debug pagp packet packet shows that neghbors sends PaGP packets periodically
every 20 sec or so - well in this case I'll give PaGP a chance in my
project;)
Igor |
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