Interface identifiers (IDs) in IPv6 addresses are used to identify a unique interface on a link and are sometimes referred to as the "host portion" of the IPv6 address. Interface IDs must be unique on a link. They are always 64-bits long and can be dynamically created, based on the data-link layer address. The specific data link layer type of the interface determines how the IPv6 interface IDs are dynamically created and how address resolution works. For Etherne..
SNMP Versions 1 and 2 included a standard generic MIB, with initial MIB-I (version 1, RFC 1156) and MIB-II (version 2, RFC 1213). MIB-II was actually created in between the release of SNMPv1 and v2, with SNMPv1 supporting MIB-II as well. After the creation of the MIB-II specification, the IETF SNMP working group changed the strategy for MIB definition. Instead of the SNMP working group creating standard MIBs, other working groups, in many different technology areas, were task..
Using Auto-QoS to Simplify a Configuration
You can also configure Cisco switches to support a variety of other QoS mechanisms and parameters. The list of features and configuration commands can be overwhelming, and the actual configuration can be quite complex. This is one reason why the bulk of QoS topics are no longer covered on the SWITCH exam. Courses and testing aside, you will sometimes need to configure some advanced QoS features on a switch. To reduce the complexity, Cisco introduced the Auto-QoS feature on m..
Tunneling with Dynamic Routing Protocols
Dynamic routing and tunnels can be a dangerous combination. It is critical to ensure that the routers never get confused and think that the best path to the tunnel destination is through the tunnel itself. We offer three different ways of resolving this problem. The first is to use static routes for the tunnel destination address: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#interface Tunnel1 Router1(config-i..
To enable MD5-based EIGRP packet authentication, you must first define a key chain for the encryption, and then apply the authentication commands to the interface as follows: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#key chain ORA Router1(config-keychain)#key 1 Router1(config-keychain-key)#key-string oreilly Router1(config-keychain-key)#exit Router1(config-keychain)#exit Router1(config)#interface Ser..
