Within the SNMP framework, the SNMP engine is the entity that sends/receives SNMP messages. The engine also performs message authentication and encryption. The engine ID is simply an identifier for the engine. Typically, you do not need to specify an engine ID as the router will use a default ID. The local ID is important because it is used as an input when creating security digests for user passwords. You will only configure a remote engine ID when you are sending SNMPv3 traps (informs) to another SNMP engine. In that case, you have to use the remote engine's ID to create the security digest. The 'snmp-server engineID local|remote' commands are used to configure these IDs, if required. If you don't have the correct remote engine ID, the security digest will be incorrect and the SNMP inform will simply be discarded by the remote engine.
This command is used to create usernames/passwords that can be used by other SNMP engines to authenticate when they try to access the local router via SNMP. It's a better form of security than using just communities
YOu can use this command to create SNMP groups to which you can then assign users. For example, if you have a certain set of users who you would like to provide restricted SNMP access to, you can create a group with the appropriate privileges. You then assign users to these groups so that they inherit these privileges. You can have multiple groups...
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...