ipv4InterfaceTable/ipv6InterfaceTable.ipReasmTimeout
Source: http://sourceforge.net/tracker/index.php?func=detail&aid=1668193&group_id=12694&atid=312694

./configure --with-mib-modules="ip-mib/ipv4InterfaceTable ip-mib/ipv6InterfaceTable tunnel"

Index: agent/mibgroup/if-mib/data_access/interface_linux.c
===================================================================
RCS file: /cvsroot/net-snmp/net-snmp/agent/mibgroup/if-mib/data_access/interface_linux.c,v
retrieving revision 1.40
diff -u -p -r1.40 interface_linux.c
--- agent/mibgroup/if-mib/data_access/interface_linux.c	30 Jan 2007 13:39:42 -0000	1.40
+++ agent/mibgroup/if-mib/data_access/interface_linux.c	25 Feb 2007 04:16:08 -0000
@@ -690,7 +690,9 @@
          * (see ip_frag_reasm: if(len > 65535) goto out_oversize;)
          */
         entry->reasm_max = 65535;
-
+       entry->ns_flags |= NETSNMP_INTERFACE_FLAGS_HAS_V4_REASMMAX;
+       entry->ns_flags |= NETSNMP_INTERFACE_FLAGS_HAS_V6_REASMMAX;
+ 
         netsnmp_access_interface_entry_overrides(entry);
 
         entry->speed_high = entry->speed / 1000000;