Hi there,
On Linux, snmpd doesn't respond when walking ipv6InterfaceTable.
$ snmpwalk -v 2c -c public localhost .1.3.6.1.2.1.4.30
IP-MIB::ipv6InterfaceTable = No Such Object available on this agent at this
OID
According to the debug message, an error occurs at 4th column:
Received SNMP packet(s) from UDP: [127.0.0.1]:32769
GETNEXT message
-- IP-MIB::ipv6InterfaceTable
unknown column 4 in _ipv6InterfaceTable_get_column
And then, according to RFC4293, column 4 is reserved and the description
is commentted out.
-- This object ID is reserved as it was used in earlier versions of
-- the MIB module. In theory, OIDs are not assigned until the
-- specification is released as an RFC; however, as some companies
-- may have shipped code based on earlier versions of the MIB, it
-- seems best to reserve this OID. This OID had been
-- ipv6InterfacePhysicalAddress.
-- ::= { ipv6InterfaceEntry 4}
Regarding this, I think _${context}_get_column() in mfd-interface.m2c
should reply SNMP_NOSUCHINSTANCE on the reserved OID.
I suppose we can assume the OID is reserved when the number of column
is between the minimum and the maximum.
Here's the patch for CVS (2007/Feb/19)
I confirmed this patch with linux-2.6.20 and OpenSUSE 10.2.
Thank you,
----
Mitsuru Chinen <[EMAIL PROTECTED]>
Index: local/mib2c-conf.d/
===================================================================
RCS file: /cvsroot/net-snmp/net-snmp/local/mib2c-conf.d/mfd-interface.m2c,v
retrieving revision 1.73
diff -u -p -r1.73 mfd-interface.m2c
--- local/mib2c-conf.d/mfd-interface.m2c 23 Jan 2007 22:38:17 -0000
1.73
+++ local/mib2c-conf.d/mfd-interface.m2c 19 Feb 2007 03:44:27 -0000
@@ -876,10 +876,18 @@ rc = ${node}_get(rowreq_ctx, $m2c_node_v
@ end@ # for each column
default:
- snmp_log(LOG_ERR,"unknown column %d in _${context}_get_column\n",
column);
- break;
- }
+ if ($context.uc_MIN_COL <= column && column <= $context.uc_MAX_COL) {
+ DEBUGMSGTL(("internal:${context}",
+ "assume column %d in _${context}_get_column\n is reserved\n"
+ column));
+ rc = SNMP_NOSUCHINSTANCE;
+ } else {
+ snmp_log(LOG_ERR,
+ "unknown column %d in _${context}_get_column\n", column);
+ }
+ break;
+ }
return rc;
} /* _${context}_get_column */
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