scenario where IPv6 traps are being sent via the wrong default port (161)
"christopher.wu" <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
I looked in the bug database and didn't see this listed. I've found a scenario where snmptrap will default to port 161 for a IPv6 trap instead of port 162. In sending a simple trap on the command line I realized that it was stripping off the end of my IPv6 addr and using it as a port. snmptrap -v 2c -c trappy 2001:1890:1c00:5403::d:7 42 linkUp tcpdump shows it being sent via port 7 - 2001:1890:1c00:5403::d.7: UDP, length 69 What's interesting is that if the IPv6 addr ends in something that cannot be a port it works as expected. snmptrap -v 2c -c trappy 2001:1890:1c00:5403::d:a7 42 linkUp tcpdump shows it being sent via port 162 - 2001:1890:1c00:5403::d:a7.162: UDP, length 69 In the "How do I specify IPv6 addresses on the command line?" part of the FAQ it says the address should be in square brackets and quoted. So what I was doing was incorrect. I changed my syntax to address this issue: snmptrap -v 2c -c trappy "udp6:[2001:1890:1c00:5403::d:7]" 42 linkUp tcpdump shows it being sent via port 161 instead of port 162 - 2001:1890:1c00:5403::d:7.161: UDP, length 69 Specifying port 162 works: snmptrap -v 2c -c trappy "udp6:[2001:1890:1c00:5403::d:7]:162" 42 linkUp tcpdump shows it being sent via port 162 - 2001:1890:1c00:5403::d:7.162: UDP, length 69 If you send a similar way via IPv4 without specifying the port it defaults to 162: snmptrap -v 2c -c trappy "udp:1.1.1.1" 42 linkUp tcpdump shows it being sent via port 162 - 1.1.1.1.162: UDP, length 69 I tested with the Linux version of NET-SNMP version: 5.7.2.1 I have a way around this by specifying the port. I just thought that the developers would have liked to have this brought to their attention. ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Net-snmp-users mailing list [email protected] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users