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HPUX 11.31 nwmgr show MAC address identical

James.F
Advisor

HPUX 11.31 nwmgr show MAC address identical

hi,all!
I have a question as follow:
ebpoint2:[/root]#nwmgr

Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan0 DOWN 0x002481774456 iether 1000Base-T
lan2 UP 0x00237D3E1893 iether 1000Base-SX lan900
lan1 DOWN 0x002481774457 iether 1000Base-T
lan3 UP 0x00237D3E1893 iether 1000Base-SX lan900
lan900 UP 0x00237D3E1893 hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa

as above,lan2 lan3 form lan900,why the MAC address is identical?can any one explain it?
thanks
7 REPLIES
VK2COT
Honored Contributor

Re: HPUX 11.31 nwmgr show MAC address identical

Hello James,

That is perfectly valid state of affairs
when Auto Port Aggregation (APA) is
configured as link aggregate.

For example, here is a excerpt from the
"HP Auto Port Aggregation Administrator's
Guide HP-UX 11i v3":

QUOTE
A link aggregate has the following characteristics:

* The physical ports in the link
aggregation use the same MAC address.

The unique MAC address for a specific
link aggregate is determined by using
the MAC address of one of the ports in
the link aggregate. All ports will use
the same MAC address.

When a physical port is removed from a
link aggregate, the port's MAC address
is reset to its own MAC address.

(the rest is deleted for the sake of brevity)
END QUOTE

Best wishes,

VK2COT
VK2COT - Dusan Baljevic
James.F
Advisor

Re: HPUX 11.31 nwmgr show MAC address identical

hiï¼ VK2COTï¼ thanks for your reply.
but in another server,nwmgr show MAC is different which make me confused,as follow:
ebpoint1:[/root]#nwmgr

Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan0 DOWN 0x00248177448C iether 1000Base-T
lan2 UP 0x00237D3E18E9 iether 1000Base-SX lan900
lan1 DOWN 0x00248177448D iether 1000Base-T
lan3 UP 0x00237D3E19ED iether 1000Base-SX lan900
lan900 UP 0x00237D3E18E9 hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa

It seems to me that the MAC address for each network interface card should be unique,am i right?Please correct me ,thanks!
James.F
Advisor

Re: HPUX 11.31 nwmgr show MAC address identical

ebpoint2:[/root]#nwmgr
lan2 UP 0x00237D3E1893 iether 1000Base-SX lan900
lan3 UP 0x00237D3E1893 iether 1000Base-SX lan900

ebpoint1:[/root]#nwmgr
lan2 UP 0x00237D3E18E9 iether 1000Base-SX lan900
lan3 UP 0x00237D3E19ED iether 1000Base-SX lan900

in ebpoint2,lan2 lan3 MAC address is identical
when in ebpoint1,lan2 lan3 MAC address is different
Emil Velez
Honored Contributor

Re: HPUX 11.31 nwmgr show MAC address identical

APA and other software applications can change the mac address (in memory only) of a lan interface on your hpux system. When the system boots it reverts back to the hardware mac address unless some software changes it.

melvyn burnard
Honored Contributor

Re: HPUX 11.31 nwmgr show MAC address identical

Have you checked thre status of the second server's APA? it may be that one of the pNIC's you think is in the APA configuration actually isn't.
My house is the bank's, my money the wife's, But my opinions belong to me, not HP!
James.F
Advisor

Re: HPUX 11.31 nwmgr show MAC address identical

hiï¼ melvyn burnard !
you are right,thanks for all of your relpy!
James.F
Advisor

Re: HPUX 11.31 nwmgr show MAC address identical

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