Hi,
I was referred by Dan McDonald to post this problem that I encountered on
this mailing list.
I am currently carrying out some experiments usign IPv4-in-IPv4 tunnels. I
have a setup similar to the one described below.
| |
|============Tunnel============ |
|| | |
|| ---|----------------------|---
|| | | | |
H1* ----- (Internet) ------| SG2* ---- (Local ----- H2* |
| Intranet) |
------------------------------
H1 has two interfaces the inner packet is addressed to the internal
interface at of H1 and the outer packet is addressed to the external
interface of H1. IP packets are being sent from H2, fragmented en route and
then tunneled (Hence only the inner datagram is fragmented). Now if at H1
during IP reassembly a fragment is missing H1 should generate and ICMP time
exceeded message, however no ICMP packets are being generated.
If the tunnel is removed an ICMP packet is generated so the tunnel seems to
be creating the trouble. From netstat and kstat we can observe that
ipReassmFailed is being incremented but no packets seem to be dropped.
My question is: Is it meant to be this way, is it a possible configuration
problem, or a bug?
Kind Regards
Jean Paul Degabriele
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