Aggregatable Global Unicast Addresses
IPv6 defines several different types of unicast addresses. The format used for publicly registered addresses is called aggregatable global unicast. The term aggregatable refers to fact that these addresses can be easily aggregated to reduce the problem of large Internet routing tables. The term global refers to the fact that the address is a registered public IP address, routable through the global Internet. In short, when a company obtains a registered IPv6 prefix from a Reg..
Two-Rate, Three-Color Policer (Two Buckets)
The third main option for CB Policing uses two separate policing rates. The lower rate is the previously discussed committed information rate (CIR), and the higher, second rate is called the peak information rate (PIR). Packets that fall under the CIR conform to the traffic contract. Packets that exceed the CIR, but fall below PIR, are considered to exceed the contract. Finally, packets beyond the PIR are considered to violate the contract.The key difference between the singl..
As briefly introduced earlier, there are two models for providing the differentiated levels of network service required in converged networks: IntServ and DiffServ. IntServ Overview Think of best-effort IP service in terms of the regular mail (snail-mail) service. The mail is delivered if and when it can be, but it also might be lost (arriving at some undetermined time in the future or not at all). By comparison, IntServ is analogous to a custom mail service, such as diplom..
Virtual Private Dial-Up Networks (VPDN)
A VPDN is a network that extends remote access dialup clients to a private network. VPDN tunnels use either Layer 2 forwarding (L2F) or Layer 2 Tunnel Protocol (L2TP). Cisco introduced L2F in RFC 2341. It is also used to forward PPP sessions for Multichassis Multilink PPP. L2TP, introduced in RFC 2661, combines the best of the Cisco L2F protocol and Microsoft Point-to-Point Tunneling Protocol (PPTP). Moreover, L2F supports only dial-in VPDN, while L2TP supports both dial-in..
DLSw+ Redundancy and Fault Tolerance
There are several things you can do to improve the reliability and fault tolerance of your network. Many of these solutions have the added benefit of improving performance. The first important thing to consider is having more than one DLSw peer router connected to the mainframe's Token Ring. In this case, you will want to make sure that you balance the load between the two peers as much as possible: dlsw-branch#configure terminal Enter configuration commands, one per line.&n..
