MPLS Interaction with the Border Gateway Protocol
In the section “Label Binding and Distribution,” earlier in this appendix, you saw that a label is assigned to every IP prefix in the IP routing table of a router acting as LSR, the only exception being routes learned through the Border Gateway Protocol (BGP). No labels are assigned to these routes and the ingress Edge-LSR uses the label assigned to the BGP next hop to label the packets forwarded toward BGP destinations. To illustrate this phenomenon, assume that the MAE..
Single-Rate, Two-Color Policing (One Bucket)
Single-rate, two-color policing is the simplest option for CB Policing. This method uses a single policing rate with no excess burst. The policer will then use only two categories (conform and exceed), defining a different action on packets of each type. (Typically, the conform action is to transmit the packet, with the exceed action either being to drop the packet or mark it down.) While this type of policing logic is often called single-rate, two-color policing, it is some..
Filtering by Source or Destination IP Address
You can use standard access-lists to block packets from specified IP source addresses: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#access-list 50 deny host 10.2.2.2 Router1(config)#access-list 50 permit any Router1(config)#interface Serial0/1 Router1(config-if)#ip access-group 50 in Router1(config-if)#exit Router1(config)#end Router1# You can filter packets based on both the source and destination addresses w..
Differences Between Frame Relay Traffic Shaping and Generic Traffic Shaping
This section explains the differences between generic traffic shaping and Frame Relay Traffic Shaping. Generic traffic shaping shapes traffic by reducing outbound traffic flow to avoid congestion. Generic traffic shaping is applied on a per-interface basis, and access lists can be used to selectively filter the type of traffic to shape. Generic traffic shaping works with Frame Relay, ATM, Switched Multimegabit Data Service (SMDS), and Ethernet. Both generic traffic shaping an..
RIP Version 1 does not support authentication. If you are sending and receiving RIP Version 2 packets, you can enable RIP authentication on an interface. The key chain determines the set of keys that can be used on the interface. If a key chain is not configured, no authentication is performed on that interface, not even the default authentication. Therefore, you must also perform the tasks in the section "Managing Authentication Keys" in the "Configuring IP Routing Proto..
