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-rw-r--r--src/vnet/ip/ip4_to_ip6.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/ip/ip4_to_ip6.h b/src/vnet/ip/ip4_to_ip6.h
index 21538a90e44..e78985bd9be 100644
--- a/src/vnet/ip/ip4_to_ip6.h
+++ b/src/vnet/ip/ip4_to_ip6.h
@@ -414,8 +414,8 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
if ((rv = fn (p, ip4, ip6, ctx)) != 0)
return rv;
- //Truncate when the packet exceeds the minimal IPv6 MTU
- if (p->current_length > 1280)
+ //Truncate when ICMPv6 error message exceeds the minimal IPv6 MTU
+ if (p->current_length > 1280 && icmp->type < 128)
{
ip6->payload_length = clib_host_to_net_u16 (1280 - sizeof (*ip6));
p->current_length = 1280; //Looks too simple to be correct...