On Mon, 2003-06-02 at 14:31, james wrote: > Is there a switch or flag that I can start MRTG with to bind to a > specific ethernet interface ?
Sort of, you can specify the source interface in the snmp queries. The syntax for this is not documented in the mrtg manuals - it's in the SNMP_util.pm README file... [blockquote] The port parameter was recently augmented to allow the specification of the IP address (or hostname) and port of the machine doing the query in addition to the IP address (or hostname) and port of the machine being queried. Some machines have additional security features that only allow SNMP queries to come from certain IP addresses. If the host doing the query has multiple interface, it may be necessary to specify the interface the query should come from. The port parameter is further broken down into "remote_port!local_address!local_port". Here are some examples: somehost somehost:161 somehost:161!192.168.2.4!4000 use 192.168.2.4 and port 4000 as source somehost:!192.168.2.4 use 192.168.2.4 as source somehost:!!4000 use port 4000 as source Most people will only need to use the first form ("somehost"). [/blockquote] So, taking the mrtg manual statement: [blockquote] Extended Host Name Syntax. In all places where [EMAIL PROTECTED]'' is accepted, you can add additional parameters for the SNMP communication using colon-separated suffixes. The full syntax is as follows: [EMAIL PROTECTED]:[port][:[timeout][:[retries][:[backoff][:version]]]]] where the meaning of each parameter is as follows: port the UDP port under which to contact the SNMP agent (default: 161) timeout initial timeout for SNMP queries, in seconds (default: 2.0) retries number of times a timed-out request will be retried (default: 5) backoff factor by which the timeout is multiplied on every retry (default: 1.0). version for SNMP version. If you have a fast router you might want to put a '2' here. This will make mrtg try to poll the 64 bit counters and thus prevent excessive counter wrapping. Not all routers support this though. Example: 3:[EMAIL PROTECTED]:::::2 [/blockquote] The "port" section can be extended to specify the source address (and, if truly needed, the source port). Something like: 3:[EMAIL PROTECTED]:!10.10.10.1::::2 That might make a good manual addition. -- Daniel J McDonald, CCIE 2495, CNX Austin Energy -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi