Hp passthru modules and cisco 3020

[jonny123]

we currently have cisco 3020 modules on our hp blades but we would like to move to passthru modules.

is there a equivalent of #of ports on 3020 vs the passthru?

The 3020 has 16 internal and 8 external

how does that compare to the passthru?

[HEM_2]

the 1Gb ethernet passthrough modules have 16 external ports that map directly to the midplane to each possible blade server port for that bay.

[jonny123]

it says it has

sixteen internal 1Gb downlinks and sixteen external 1Gb RJ-45 copper uplinks


what exactly does this mean? say I have a full chassis with 8 bl685s with 6nics each, how many passthrus do I need?

[HEM_2]

yes, 16 downlinks to 16 external links... i.e. every NIC trace is passed through the midplane to an external RJ-45 port.

**** the following info assumes a C7000 ****

BL685c servers have 4 integrated NICs: 2 NICs map to Interconnect Bay 1 and 2 NICs map to Interconnect Bay 2.

If you have 6 NICs total that tells me you have an additional dual-port ethernet mezzanine card. The mezzanine card will map to 2 of the other Interconnect Bays dpending on which mezzanine slot the card is in. For Example, if the dual-port mezz card is in mezz slot 1 than 1 NIC port will map to bay 3 and 1 NIC port will map to bay 4.

This will result in the need for a total of 4 1Gb ethernet pass-through modules to ensure that each of your server NICs will have an external RJ-45.

see attached port mapping info.

if you have a C3000, the info is different

[JKytsi]

passthru = cabling like with rackmounted servers 1 cable for 1 NIC