Walter Marguccio pisze:
we have a z01-BC model K03, 4 LPARs, equipped with 4 OSA E
Hello list,
we have a z01-BC model K03, 4 LPARs, equipped with 4 OSA Express-3 1GB Ethernet
SX
(CHPID OSD) and 2 OSA Express-2 (CHPID OSC).
Last Sunday we had to swap our network switch with a new one, and after we
connected the cables
coming from all OSAs to the new switch, we were able to ping/telnet to the OSCs
(I had back MCS
consoles and TSO via non-SNA) but we weren't be able to ping/telnet to the OSDs
anymore.
Issuing D TCPIP,,N,DEV from the console showed all 4 devices in ACTIVE status.
Issuing a TSO ping from one LPAR to all others was successful, too.
D NET,TRL,TRLE=trle_name for our TRLEs showed ACTIVE as well.
Eventually we had to shutdown all 4 LPARs, configuring all 4 OSAs OSD off from the Service Element,
put the same cards in Service Mode, put everything back on line, IPL and voila', the OSAs OSD were reachable
again.
I can't believe that a sophisticated hw like the z10 and its OSA-Express cards
need such a reset action
after a switch has been swapped. My impression is that we missed a much easier
solution which could
have prevented us to shutdown an entire Sysplex and be cut off from the rest
ofthe world for two hours.
Can someone shed some light ?
1. In the old days "sophisticated OSA cards" had to be varied OFF/ON
whenever Eth signal was lost. It was big pain in the *ss. Nowadays, OSA
Express2 (and newer) cards do not have such "feature" anymore.
(BTW: No need to shutdown LPARs, it can be done online, only network is
affected - but it's already down)
What happened in your case? I suspect it can be related to "ARP
takeover" process. Look for messages like:
EZD0041I INTERFACE ethname1 HAS TAKEN BACK ARP RESPONSIBILITY FROM
INTERFACE ethname2
BTW2: Do you really have 4 OSA Ex3 cards and 2 Ex2 cards or PORTs?
If cards then you have 4x4 + 2x2 = 20 Eth ports. Quite a lot. And 4 OSC
servers.
If ports, then you have one OSE Ex3 and one OSA Ex2 card. Sounds more
reasonable.
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