Patrick, Thank you for your response.
I'm not sure you completely understood. I asked about dynamic VIPA and your example is for a static VIPA. The problem I had was with OMPROUTE OSPF statements and not the PROFILE statements. My use of the word "advertise" - rather than "define" perhaps - is supposed to be a hint that I was talking about the dynamic routing. I'm recalling an issue I had back in 2001. If I remember correctly, what I wanted to do was ensure that, if a dynamic VIPA was not "active" in any of the LPARs, typically of a parallel sysplex, then an attempt to start, say, a TCP connection with that VIPA would get as far as the "backbone", Area 0, router which fed the stub area supporting the LPARs and no further. I accept that the address range covering the dynamic VIPAs would probably be "consolidated" in that router and it was unrealistic that each potential client would know within its routing table that the application corresponding to the dynamic VIPA was unavailable. Blocking the TCP connection attempts at the Area 0/stub area router seemed the best option. Unfortunately OMPROUTE didn't want to play ball. At the time I was working on this I wasn't that familiar with OSPF. Since then I have studied OSPF somewhat but I haven't discovered that "host" routes should not be advertised just like net and subnet routes. However, I must confess to being a self-taught IP person and I may have suffered from not attending, say, Cisco classes on all these practical IP matters. I'm hoping that Hal Merritt or John Giltner or anyone else actually using the VIPARANGE IOCTL or VIPARANGE BIND flavours of dynamic VIPA will be able to comment on their approach to this issue and on what they have achieved. Chris Mason ----- Original Message ----- From: "Patrick Lyon" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <IBM-MAIN@BAMA.UA.EDU> Sent: Thursday, 23 February, 2006 3:07 PM Subject: Re: TCP/IP over Cisco router CIP > On Thu, 23 Feb 2006 14:45:29 +0100, Chris Mason <[EMAIL PROTECTED]> > wrote: > > >There was an issue with VIPAs and OMPROUTE OSPF dynamic routing. Ideally it > >should be possible to advertise a VIPA using a "host", single (the VIPA > >itself) address rather than a subnet range. When I examined setting this up > >in 2001, the last time I consulted on this topic, I seem to recall this > >ideal was not possible. Has anything changed or is it still necessary to > >assign, say, 4 addresses to each dynamic VIPA in order to advertise > >availability of individual dynamic VIPAs outside the LPAR? Of course, the > >waste may not really be a problem when assigning addresses from, say, > >network 10 in an intranet. > > > >Chris Mason > > > Chris, yes this is possible. I am not sure how it is set up in the Cisco > world, but here are our parameters: > > IPCONFIG SOURCEVIPA > VARSUBNETTING > IGNOREREDIRECT > DATAGRAMFWD > ; > DEVICE LINK1 CLAW 1F0 TESTMVS C7513 NONE 200 200 4096 4096 > LINK C7513 IP 0 LINK1 > > DEVICE LINK2 CLAW 1E0 TESTMVS C7206 NONE 200 200 4096 4096 > LINK C7206 IP 0 LINK2 > > DEVICE VDEV VIRTUAL 0 > LINK VLINK VIRTUAL 0 VDEV > > ; > HOME > 10.129.0.69 VLINK > 10.129.0.35 C7206 > 10.129.0.3 C7513 > ; > > START LINK1 > START LINK2 > > We use OMPROUTE and OSPF. > > Regards, > Patrick Lyon ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
