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тАО02-04-2009 10:56 AM
тАО02-04-2009 10:56 AM
problems with 3rd party transparent mode device on Procurve router
We use Procurve 3500yl/5400zl routers,
and are trying to add a 3rd party
transparent mode device, in this
case a Cisco ACE 4710 server load balancer.
It appears the Procurve switch gets confused when
it sees the same MAC address on 2 vlans, as
would be the case with a transparent mode
device bridging 2 vlans.
We can get it to work if we use the ACE
in routed mode, or if we use the HP device
in purely layer 2 mode (no routing). In that
latter case, the HP is fine when it sees the
same MAC on 2 vlans.
I've put additional information here,
including how to replicate this. We haven't
opened a case yet.
https://strobe.uwaterloo.ca/~twiki/bin/view/ISTNS/ProcurveL2L3Table
Director, Network Services
Information Systems and Technology
MC 1018
(519)888-4567 x38323
University of Waterloo, Waterloo, ON
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тАО02-04-2009 11:11 PM
тАО02-04-2009 11:11 PM
Re: problems with 3rd party transparent mode device on Procurve router
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тАО02-04-2009 11:19 PM
тАО02-04-2009 11:19 PM
Re: problems with 3rd party transparent mode device on Procurve router
Yes i have seen the exact same thing trying to install a juniper device in transparent mode.
I ended up using it i routemode instead.
The problem would be solved if you could change the mac address on the interfaces on the cisco, but i don't know if this is possible when used in transparent mode.
Would be interesting to see if this setup would work on any other brand of switch, 3com, cisco or whatever?
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тАО02-05-2009 10:18 AM
тАО02-05-2009 10:18 AM
Re: problems with 3rd party transparent mode device on Procurve router
I've confirmed Procurve works if the route
point is upstream of the 3500yl doing
the bridging. But, if the bridged
vlans traverse the Procurve doing
the routing, it fails.
I've also confirmed that a Cisco 3750
works fine doing bridging and routing
simultaneously. Cisco config and
results added to:
https://strobe.uwaterloo.ca/~twiki/bin/view/ISTNS/ProcurveL2L3Table
Director, Network Services
Information Systems and Technology
MC 1018
(519)888-4567 x38323
University of Waterloo, Waterloo, ON
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тАО02-05-2009 12:37 PM
тАО02-05-2009 12:37 PM
Re: problems with 3rd party transparent mode device on Procurve router
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тАО02-06-2009 11:43 AM
тАО02-06-2009 11:43 AM
Re: problems with 3rd party transparent mode device on Procurve router
I opened a case (3604783742) and was advised
the Procurve supports a single layer 3
forwarding database, and would not support
this environment.
But, I did some more tests, and found
the Procurve does in fact support the same
MAC on different vlans, for both layer
2 and layer 3.
ProCurve Switch 3500yl-48G# show arp
IP ARP table
IP Address MAC Address Type Port
--------------- ----------------- ------- ----
129.97.142.100 00188b-d0bdfb dynamic 11
129.97.14.100 00188b-d0bdfb dynamic 35
Details added to end of:
https://strobe.uwaterloo.ca/~twiki/bin/view/ISTNS/ProcurveL2L3Table
This suggests the ASIC can support the
environment, but there may be a firmware
bug related to populating the ARP table,
when the same MAC/IP combination appears
on 2 vlans. (This recent test saw the
same MAC, but different IPs, on the 2 vlans)
Director, Network Services
Information Systems and Technology
MC 1018
(519)888-4567 x38323
University of Waterloo, Waterloo, ON
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тАО05-29-2009 06:04 PM
тАО05-29-2009 06:04 PM
Re: problems with 3rd party transparent mode device on Procurve router
5400(vlan-1)# ip-recv-mac-address
MAC-ADDR The L3-mac-address to be associated with a VLAN.
I had to do this once for a similar transparent proxy/filtering device and it worked very nicely.