mikulska@odin.ucsd.edu (Margaret Mikulska) (07/30/90)
Does Apollo support proxy ARP ? (We are currently running SR10.2). I couldn't find any info in any TFM, but I may have an incomplete set of them. Thanks in advance (e-mail preferred). Margaret Mikulska system administrator UC San Diego Dept. of Electrical and Computer Engineering Internet: mmikulska@ucsd.edu Bitnet: MMIKULSKA@UCSD
rew@apollo.HP.COM (Robert Wolters) (07/30/90)
> From: mikulska@odin.ucsd.edu (Margaret Mikulska) > > Does Apollo support proxy ARP ? (We are currently running SR10.2). > I couldn't find any info in any TFM, but I may have an incomplete set > of them. Hi Margaret, No, we currently do not support Proxy ARP. It is possible for sr11. But not for sr10.3. Cheers, Rob Wolters Chelmsford Response Center Hewlett-Packard ====================================================== My opinions are my own, and do not reflect those of HP ======================================================
rees@dabo.ifs.umich.edu (Jim Rees) (07/31/90)
In article <12081@sdcc6.ucsd.edu>, mikulska@odin.ucsd.edu (Margaret Mikulska) writes: Does Apollo support proxy ARP ? (We are currently running SR10.2). Proxy ARP is a Bad Thing. I certainly hope Apollo doesn't support it. I thought everyone had subnets now. Do you have some machine that doesn't? Or do you need proxy ARP for some other reason?
jal@acc (John Lauro) (07/31/90)
In article <1990Jul30.210655.19558@terminator.cc.umich.edu> rees@citi.umich.edu (Jim Rees) writes: >In article <12081@sdcc6.ucsd.edu>, mikulska@odin.ucsd.edu (Margaret >Mikulska) writes: > Does Apollo support proxy ARP ? (We are currently running SR10.2). > >Proxy ARP is a Bad Thing. I certainly hope Apollo doesn't support it. > >I thought everyone had subnets now. Do you have some machine that doesn't? >Or do you need proxy ARP for some other reason? Don't know about Jim, but we have subnets and use proxy ARP. When we had an Apollo acting as a router, we ran into problems because it didn't support proxy ARP. If your gateway to the internet doesn't support RIP, it makes it hard for computers on the other side of the router to access anything outside of your domain... We finally ended up getting a dedicated Proteon router. In our situation proxy ARP where we only need to set up the subnets for the routers and have proxy ARP enabled is easier to maintain then RIP. (Not to mention keeps all those RIP broadcasts off the net.) We will be upgrading our connection to the internet, but until then, we have to use proxy ARP... Proxy ARP may not be the best solution, but it appears to be better than what Apollo supports (RIP). I admit, I am not very knowledgeable in this area, so enlighten me... :-) The only advantage I see of RIP over proxy ARP is if there are multiple paths the data could take if a link goes down, etc... If no redundant paths, what's the "Bad Thing" about proxy ARP? If you change a subnet or something, all you do is change it on the router that effects a subnet, so maintenane is easy and quick. As easy if not easier than RIP. Or does Apollo support something better than RIP? I noticed they supply source to gated which includes RIP, EGP, and HELLO. However, I didn't look into it, and know next to nothing about EGP and HELLO. - John_Lauro@ub.cc.umich.edu
rees@dabo.ifs.umich.edu (Jim Rees) (07/31/90)
In article <1990Jul31.132558.7841@caen.engin.umich.edu>, jal@acc (John Lauro) writes: When we had an Apollo acting as a router, we ran into problems because it didn't support proxy ARP. If your gateway to the internet doesn't support RIP, it makes it hard for computers on the other side of the router to access anything outside of your domain... I don't understand. You don't give details of your topology, but I can't imagine any network where proxy arp would be easier to set up or work better than subnets with RIP (routed). I'm using routed here, and I don't do anything to set it up other than turn it on. Of course it doesn't help that the sr10.2 routed doesn't work, but you can get a working version from Apollo (patch 108, timestamp 1-Dec-89). I also still don't understand why you would need proxy arp if your machines all understand subnets. You seem to be saying that you have a routing problem, but I don't see how proxy arp can possibly help there. I don't even see how you could set up proxy arp if you are using subnets. If the machine you are trying to arp is on the same subnet, it will just answer by itself with no need for a proxy. If it's on a different subnet, the caller won't try to arp it, it will try to find a gateway. Did I miss something?