From: Marc Lavine (mlavine@foundrynet.com)
Date: 06/30/03
Peter,
Is this for directly connected subnets, or is there some other case you have
in mind?
Marc
----- Original Message -----
From: "Peter Phaal" <peter.phaal@inmon.com>
To: <sflow@sflow.org>
Sent: Thursday, June 26, 2003 11:25 AM
Subject: [sFlow] Encoding unknown addresses in sFlow datagrams
> Currently there is no specified way to encode an unknown address (for
> example, the next_hop address may not be known for a static route).
>
> One could specify that an IPv4 address of 0.0.0.0 means unknown, although
> this may be a little obscure, especially if returned by an IPv6 router. An
> explicit unknown value is preferable and can easily be defined as follows:
>
> /* Address types */
>
> typedef opaque ip_v4[4];
> typedef opaque ip_v6[16];
>
> enum address_type {
> UNKNOWN = 0,
> IP_V4 = 1,
> IP_V6 = 2
> }
>
> union address (address_type type) {
> case UNKNOWN:
> void;
> case IP_V4:
> ip_v4;
> case IP_V6:
> ip_v6;
> }
>
> Comments?
>
> Peter
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