Locations for Marking and Matching
Figure 14-3 shows a sample network, with notes about the locations of the QoS fields. Figure 14-3 Sample Network Showing Non-IP Markable QoS Fields In such a network, the IPP and DSCP inside the IP packet remain intact from end to end. However, some devices may not be able to look at the IPP or DSCP fields, and some may find it more convenient to look at some other header field. For instance, an MPLS Label Switch Router (LSR) inside the MPLS cloud may be configured ..
This section discusses MPLS operation over interfaces where labeled packets are sent encapsulated in Layer 2 frames (Frame-mode MPLS operation). Label Switch Routers (LSRs) use Label Distribution Protocol (LDP, an IETF standard) or Tag Distribution Protocol (TDP, a Cisco pre-standard) to exchange IP prefix-to-label bindings. A Label Information Base (LIB, also called a Tag Information Base [TIB]) stores these bindings, which are used to build the Forwarding Information Base ..
Optional Commands for Configuring EIGRP
Optional commands described in this section are summarized in Table 4-2. Table 4-2. Optional Commands for Configuring EIGRP
Single-Rate, Three-Color Policer (Two Buckets)
When you want the policer to police at a particular rate, but to also support a Be, the policer uses two token buckets. It also uses all three categories for packets—conform, exceed, and violate. Combining those concepts together, such policing is typically called single-rate, three-color policing. As before, CB Policing fills the buckets in reaction to packet arrival. (For lack of a better set of terms, this discussions calls the first bucket the Bc bucket, because it is ..
To review basic routing processes, consider Figure 6-1. In this topology, PC1 needs to send traffic to Server1. Notice that these hosts are on different networks. So, the question becomes, how does a packet from a source IP address of 192.168.1.2 get routed to a destination IP address of 192.168.3.2? Consider the following walkthrough of this process, step-by-step: Step 1. PC1 compares its IP address and subnet mask of 192.168.1.2/24 with the destination IP address and subn..
