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- From: knobi@knobi.munich.sgi.com (Martin Knoblauch)
- Subject: Re: FAQ How to obtain my ethernet address?
- Message-ID: <1992Nov13.084058.6580@eurohub.neu.sgi.com>
- Sender: news@eurohub.neu.sgi.com (Net news)
- Nntp-Posting-Host: knobi.munich.sgi.com
- Organization: Silicon Graphics, Inc.
- References: <34037@adm.brl.mil> <1du9g1INNj2o@fnnews.fnal.gov> <s9gp934@rhyolite.wpd.sgi.com> <1992Nov13.025023.27636@news.nd.edu>
- Date: Fri, 13 Nov 1992 08:40:58 GMT
- Lines: 63
-
- In article <1992Nov13.025023.27636@news.nd.edu>, root@sanger.chem.nd.edu
- (Doctor Math) writes:
- |> In article <s9gp934@rhyolite.wpd.sgi.com> vjs@rhyolite.wpd.sgi.com
- |> (Vernon Schryver) writes:
- |> >Instead, use `netstat -ina`. It is supposed to return the MAC
- |> address
- |> >and does. With netsetat, you don't have to make fiddles about the
- |> >relation, if any, between the system ID and any of the network MAC
- |> >addresses.
- |>
- |> It also claims that my machine has the addresses 224.0.2.2 and
- |> 224.0.0.1,
- |> listed between the primary IP address and the ethernet address.
- |> What are these? I'm not using SLIP. (I feel like it's a trick and I
- |> really should know what these are already.)
- Hey,
-
- the whole 224.x.x.x network is reserved for a "trick" called
- "multicast-groups". I'm not a network specialist, so maybe
- someone else might want to elaborate on this issue. The addresses
- you mention indicate that you participate (for some default
- reasons that I don't know,but which can definitely be explained
- by a network specialist) in the following protocols:
-
- 224.0.0.1 all-systems.mcast.net
- 224.0.2.2 sun-rpc.mcast.net
-
- With 4.0.5 you get the following entries in /etc/hosts that indicate
- that our (SGI) machines know about the following multicast services:
-
- # Assigned multicast group addresses listed in RFC-1060 ("Assigned
- Numbers").
- # These entries can be deleted if you don't want them.
- # (They are also available via the Internet DNS name servers.)
- 224.0.0.1 all-systems.mcast.net
- 224.0.0.2 all-routers.mcast.net
- 224.0.0.4 dvmrp.mcast.net
- 224.0.0.5 ospf-all.mcast.net
- 224.0.0.6 ospf-dsig.mcast.net
- 224.0.1.1 ntp.mcast.net
- 224.0.1.2 sgi-dog.mcast.net
- 224.0.1.3 rwhod.mcast.net
- 224.0.2.1 rwho.mcast.net
- 224.0.2.2 sun-rpc.mcast.net
-
- I assume that these entries just mean that you can access the service
- by name instead of IP number.
-
-
- Hope this helps to enhance the confusion.
-
-
- Martin
- --
- +---------------------------------+----------------------------------+
- |Martin Knoblauch | Silicon Graphics GmbH |
- |Application Support | Am Hochacker 3 - Technopark |
- |Silicon Graphics Computer Systems| W-8011 Grasbrunn-Neukeferloh, FRG|
- | | Phone: (+int) 89 46108-179 or -0 |
- | | Fax: (+int) 89 46108-222 |
- +---------------------------------+----------------------------------+
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