Reference Guide

Static Host to IP mapping Table
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Host IP-Address
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google.com
172.217.160.142
yahoo.com
98.139.180.180
Supported Releases 10.4.0E(R1) or later
show ip vrf
Displays the VRF instance information.
Syntax
show ip vrf [management | vrf-name]
Parameters
• management—Enter the keyword management to display information corresponding to the management
VRF instance.
• vrf-name—Enter the name of the non-default VRF instance to display information corresponding to that
VRF instance.
Default Not congured
Command Mode EXEC
Usage Information None
Example
OS10# show ip vrf
VRF-Name Interfaces
default Mgmt1/1/1
Eth1/1/1-1/1/2
Vlan1
management
OS10# show ip vrf management
VRF-Name Interfaces
management
Supported Releases 10.4.0E(R1) or later
Bidirectional Forwarding Detection
The Bidirectional Forwarding Detection (BFD) protocol rapidly detects communication failures between two adjacent routers. BFD is a
simple and lightweight replacement for link-state detection mechanisms in existing routing protocols. It also provides a failure detection
solution for links with no routing protocol.
BFD provides forwarding-path failure detection that is performed in milliseconds, instead of seconds, as with routing protocol hello packets.
Because BFD is independent of routing protocols, it provides consistent failure detection in a network. BFD eliminates multiple protocol-
dependent timers and methods. Networks converge faster because BFD triggers link-state changes in the routing protocol sooner and
more consistently.
BFD operates as a simple hello mechanism. Two neighboring routers running BFD establish a session using a three-way handshake. After
the session is established, the routers exchange periodic control packets at sub-second intervals. If a router does not receive a hello packet
within a specied time, routing protocols are notied that the forwarding path is down.
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Layer 3