Hi Dave, Thank you very much for all your help and assistance. I have a better understanding of routers now.
I am running net-snmp in ubuntu 10.04 Lucid inside Windows XP SP3. I installed a Linksys router with the assistance of Linksys tech support. They said there was an IP conflict and they set the router to 10.10.10.1 instead of 192.168.1.1. I can see the gateway IP address from Windows XP, i.e. 10.10.10.1 and I can ping it but I cannot see it from the ubuntu vmware machine. It is showing a different gateway IP address but I can ping 10.10.10.1. However when I try snmpwalk ... 10.10.10.1 net-snmp times out. I believe net-snmp cannot see the router. Is there a way I can debug this? By the way to try and find the router I am doing ifconfig on ubuntu and I check the gateway IP address. There are 2 or 3 IP addresses that show up. How can I tell which device the IP belongs to? Once again, thank you for all your help and assistance. Simon Mpasi -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dave Shield Sent: Wednesday, April 13, 2011 11:39 AM To: Simon Mpasi Cc: [email protected] Subject: Re: Familiarity with Net SNMP On 13 April 2011 15:35, Simon Mpasi <[email protected]> wrote: > I believe a router has 2 addresses, an IP address and a MAC IP address. No. A network interface will typically have a hardware address (sometime also called a MAC address or an ethernet address - assuming that this is an ethernet interface!), and an IP address Not only are these different things - they will typically *look* completely different. An IP address is 32 bits, typically written as four decimal numbers (separated by dots for readability). It would look something like 10.1.2.3 or 127.0.0.1 An ethernet address is 48 bits, typically written as six hex pairs (separated by colons or hyphens, again for readability) Something like f1:2e:d3:4c:b5:97 SNMP (and all IP-level protocols) work with the IP address. You can ignore the hardware address for most purposes. > If I want to talk to a router, which IP address do I use? A router will have several network interfaces - one on each of the networks that it is routing between. You should use the IP address corresponding to the network that you are currently on. This will typically be the gateway address that you see in the routing table on your local box. So if you are on a machine with address 10.0.1.2 with a gateway of 10.0.0.1, then you should use the router address 10.0.0.1 If you are on a machine with address 99.88.77.66 with a gateway of 99.88.77.100, then you should use the router address 99.88.77.100 > Also, how do I overcome > any protection or passwords on my own router? You do not "overcome" the protection on the router. You use the community string (or SNMPv3 settings) that have been configured on the router for management of that router. See the router documentation for more details. Dave ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Net-snmp-coders mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
