Router Configuration Guide 3
Table of Contents
Getting Started...................................................................................................................................... 11
About This Guide................................................................................................................................................11
In This Chapter...................................................................................................................................................11
Router Configuration Process ............................................................................................................................11
IP Router Configuration ...................................................................................................................... 13
In This Chapter...................................................................................................................................................13
Configuring IP Router Parameters .....................................................................................................................13
Interfaces.......................................................................................................................................................14
Network Interface .....................................................................................................................................14
Network Domains.....................................................................................................................................14
System Interface ......................................................................................................................................15
Unicast Reverse Path Forwarding Check (uRPF)....................................................................................16
Creating an IP Address Range ................................................................................................................17
QoS Policy Propagation Using BGP (QPPB)...........................................................................................17
QPPB .......................................................................................................................................................19
QPPB and GRT Lookup...........................................................................................................................24
Router ID.......................................................................................................................................................27
Autonomous Systems (AS) ...........................................................................................................................28
Confederations..............................................................................................................................................28
Proxy ARP.....................................................................................................................................................29
Exporting an Inactive BGP Route from a VPRN ...........................................................................................30
DHCP Relay..................................................................................................................................................30
Internet Protocol Versions.............................................................................................................................30
IPv6 Address Format ...............................................................................................................................32
IPv6 Applications......................................................................................................................................33
DNS..........................................................................................................................................................35
Secure Neighbor Discovery (SeND) ........................................................................................................35
SeND Persistent CGAs ............................................................................................................................36
IPv6 Provider Edge Router over MPLS (6PE) .........................................................................................42
Static Route Resolution Using Tunnels.........................................................................................................43
Static Route ECMP Support ....................................................................................................................45
Weighted Load-Balancing over MPLS LSP........................................................................................................45
Weighted Load Balancing IGP, BGP, and Static Route Prefix Packets over IGP Shortcut ..........................46
Feature Configuration ..............................................................................................................................46
Feature Behavior......................................................................................................................................47
ECMP Considerations..............................................................................................................................48
Weighted Load Balancing Static Route Packets over MPLS LSP ...........................................................49
Bi-directional Forwarding Detection ..............................................................................................................50
BFD Control Packet .................................................................................................................................51
Control Packet Format .............................................................................................................................51
BFD for RSVP-TE ....................................................................................................................................53
Echo Support ...........................................................................................................................................53
BFD Support for BGP...............................................................................................................................54
Centralized BFD.......................................................................................................................................54
Aggregate Next Hop.................................................................................................................................55
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