sefos bfd administration guide · bfd bidirectional forwarding detection cc continuity check cv...

Sun Ethernet Fabric Operating System BFD Administration Guide

Part No: E60921-02

July 2015

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3

Contents

Using This Documentation .............................................................................................................. 5

BFD Overview ................................................................................................................................... 9

BFD Protocol Description .............................................................................................. 9

Default Configurations ................................................................................................... 9

BFD Topology Example ............................................................................................... 10

Configuring BFD ............................................................................................................................. 11

Configure SEFOS1 in Topology for Testing Oracle BFD ............................................. 11

Configure SEFOS2 in Topology for Testing Oracle BFD ............................................. 13

Configure SEFOS3 in Topology for Testing Aricent BFD ............................................. 15

BFD Over Static IP Path Configuration ....................................................................... 17

BFD Over Static IPv6 Path Configuration ................................................................... 17

BFD Over OSPF Configuration ................................................................................... 18

BFD Over OSPFv3 Configuration ................................................................................ 18

BFD Monitoring for BGP Configuration ....................................................................... 18

4 Sun Ethernet Fabric Operating System BFD Administration Guide July 2015

5

Using This Documentation

Overview – Includes the description of BFD protocol and instructions to configure it

Audience – Users implementing BFD protocol with other protocols in the router stack

Required knowledge – Working knowledge of the protocol

Product Documentation Library

Documentation and resources for this product and related products are available at http://www.oracle.com/goto/es2-72_es2-64/docs.

Acronyms and Abbreviations

Terms Explanation

Active Conceptual row is available for use by the managed device.

CreateAndGo A management station wanting to create a new instance of a conceptual row and to have its

status automatically set to active, making it available for use by the managed device,

supplies this row status value.

CreateAndWait A management station wanting to create a new instance of conceptual row (but not making it

available for use by the managed device) supplies this rowstatus value.

Destroy A management station wishing to delete all of the instances associated with an existing

conceptual row supplies this rowstatus value.

NotInService Conceptual row exists in the agent, but is unavailable for use by the managed device.

NotReady Conceptual row exists in the agent, but some more information is necessary to make it

available for use by the managed device.

BFD Bidirectional Forwarding Detection

CC Continuity check

CV Connection verification

FRR Fast-Re-Route

GACH Generic associated channel header

GAL Generalized alert label

LER Label edge router

LSP Label switched path

http://www.oracle.com/goto/es2-72_es2-64/docs


Terms Explanation

LSR Label switch router

ME Maintenance entity

MEG Maintenance entity group

MEP Maintenance entity group end point

MIP Maintenance entity group intermediate point

MPLS-OAM MPLS operations, administration, and maintenance

MPLS-TP MPLS transport profile

MPLS-TP LSP Unidirectional or bidirectional label switched path

OID Object identifier

OSPF Open shortest path first

P2P Point-to-point

PDU Packet data unit

PW Pseudowire

RDI Remote defect indication

SLA Service level agreement

SPME Subpath maintenance element

TTL Time to live

VCCV Virtual circuit connectivity verification

CLI Command Modes

This table lists the various command modes used in this document with their access and exit methods.

Command Mode Access Method Prompt Exit Method

User EXEC Initial mode for starting a

session.

SEFOS> Use the logout command to

return to the Oracle ILOM

prompt.

Privileged EXEC From User EXEC mode, use

the enable command.

SEFOS# Use the disable command to

return to the User EXEC mode.

Global Configuration From Privileged EXEC

mode, use the configure

terminal command.

SEFOS(config)# Use the exit or end command

to exit to the Privileged EXEC

mode.

Interface Configuration From Global Configuration SEFOS(config- Use the exit command to

Using This Documentation 7

Command Mode Access Method Prompt Exit Method

mode, use the

interface-type

interface-id command.

if)# return to Global Configuration

mode, or use the end command

to return to Privileged EXEC

mode.

Switch Configuration From Global Configuration

mode, use the switch

switch-name command.

SEFOS(config-

switch)# Use the exit command to

return to Global Configuration



mode.

BFD Session

Configuration

From Global Configuration

mode, use the bfd

session session-index

command.

SEFOS(config-

bfdsess)# Use the exit command to

return to Global Configuration



mode.

Feedback

Provide feedback about this documentation at http://www.oracle.com/goto/docfeedback.

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.

9

BFD Overview

BFD Protocol Description

Oracle BFD implements the Bidirectional Forwarding Detection described in the RFC 5880. BFD is a detection protocol designed to provide fast forwarding-path failure detection times for media types, encapsulations, topologies, and routing protocols. BFD detects forwarding path failures at a uniform rate, rather than the variable rates for different protocol hello mechanisms. BFD makes network profiling and planning easier and reconvergence time consistent and predictable. BFD provides subsecond failure detection between two adjacent devices and can be less CPU-intensive than protocol hello messages, because some of the BFD load can be distributed to the data plane on supported modules.

Oracle BFD supports path monitoring for the following protocols:

Static IPv4 & IPv6

BGP

OSPF

MPLS

Linux IP support for BFD is provided and the configurations are same as mentioned in this document. The supported protocols for BFD in Linux IP are static route, OSPF, and BGP in IPv4, and static route and BGP in IPv6. This document describes how to configure Oracle BFD running as a part of Sun Ethernet Fabric Operating System (SEFOS).

BFD is configurable and managed by CLI. For more information about the command modes of CLI, see CLI Command Modes.

Default Configurations

The following table lists the default values assigned to several BFD parameters, during the start-up of the router.

Parameter Default Setting

BFD Administrative System Control Status Start

BFD Global Operational Mode Asynchronous mode without echo function.

BFD Global Minimum Transmit Interval 1 second

BFD Global Minimum Reception Interval 1 second

BFD Global Detection Time Multiplier 3 seconds

BFD Global Slow Transmission Interval 1 second

BFD Session Role Active

BFD Session Mode CC (Continuity Check)


Parameter Default Setting

BFD Session Timer Negotiation Enabled

BFD Session Offloading Disabled

BFD Trap Notifications Session UP and DOWN notifications enabled

BFD Session Admin Status Enabled

BFD Version Number BFD Version 1 (RFC5880)

BFD Session State DOWN

BFD Demand Mode Disabled

BFD Control Plane Independency Disabled

BFD Generalized TTL Security Mechanism (GTSM) Disabled

BFD Session Authentication Disabled

BFD Topology Example

The following figure is an example of BFD configuration.

The figure depicts the components used in the topology, which are described as follows:

R1, R2, and R3 represent routers in which SEFOS is installed.

VLAN2 and VLAN3 represent the VLAN interfaces of the SEFOS routers.

Each SEFOS switch has a router ID.

This table lists the IPv4 and IPv6 addresses of the interfaces and hosts provided in the figure.

Router /

Host

Interface Slot IPv4 Address / Mask IPv6 Address / Prefix Length

R1 VLAN2 0/2 20.0.0.1 / 255.0.0.0 fec0::2222:0:1 / 96, 2222::1/96

R2 VLAN2 0/2 20.0.0.2 / 255.0.0.0 fec0::2222:0:2 / 96, 2222::2/96

VLAN3 0/3 30.0.0.2 / 255.0.0.0 fec0::3333:0:2 / 96, 3333::2/96

R3 VLAN3 0/2 30.0.0.3 / 255.0.0.0 fec0::3333:0:3 / 96, 3333::3/96

11

Configuring BFD

The Oracle BFD software is designed in accordance with the FSAP2 (Flexible Software Architecture for Portability) to ensure a high level of portability

This chapter describes the preliminary configurations and the configurations for the topologies of Oracle BFD. You can configure the Oracle BFD feature by accessing Global Configuration mode or Interface Configuration mode. The configuration steps described in this document begin with accessing one or both of these modes.

This chapter describes the configuration of the Oracle BFD features using CLI.

Configuring BFD over Static IPv4 & IPv6 paths

Configuring BFD over OSPF

Configuring BFD over BGP

Configure SEFOS1 in Topology for Testing Oracle

BFD

The figure in the BFD Topology Example depicts the topology setup for this configuration.

Note: For the enterprise package, ports are automatically mapped to default switch.

1. Type the following commands to configure SEFOS1 in Topology for Testing Oracle BFD.

SEFOS# configure terminal

SEFOS(config)# interface vlan 1

SEFOS(config-if)# shutdown

SEFOS(config-if)# ip address 12.0.0.1 255.0.0.0

SEFOS(config-if)# no shutdown

SEFOS(config-if)# end


SEFOS(config)# interface extreme-ethernet 0/1

SEFOS(config-if)# map switch default




SEFOS(config-switch)# vlan 1


SEFOS(config-switch-vlan)# ports extreme-ethernet 0/1

SEFOS(config-switch-vlan)# end



SEFOS(config-if)# switchport pvid 1





















2. Verify the VLAN configurations.

SEFOS# show ip interface

Vlan1 is up, line protocol is up

Configuring BFD 13

Internet Address is 12.0.0.1/8

Broadcast Address 12.255.255.255




Configure SEFOS2 in Topology for Testing Oracle

BFD


1. Type the following commands to configure SEFOS2 in BFD Topology Example.



















Configuring BFD 15
























Configure SEFOS3 in Topology for Testing Aricent

BFD


1. Type the following commands to configure SEFOS3 in topology for testing Oracle BFD.

Configuring BFD 17



















BFD Over Static IP Path Configuration

This feature enables you to monitor IP neighbor reachability by using BFD. You can configure the neighbor statically. IP moves static routes (with next hop as neighbor) to pending state when BFD notifies that the neighbor is not reachable.

BFD Over Static IPv6 Path Configuration

This feature enables you to monitor IPv6 neighbor reachability using BFD. You can configure the neighbor statically. IPv6 moves static routes (with next hop as neighbor) to pending state when BFD notifies the neighbor is not reachable. Refer to the Sun Ethernet Fabric Operating System IPv6 Administration Guide for static configurations.


BFD Over OSPF Configuration

This feature enables OSPF to detect its neighbor unreachable faster. BFD reports neighbor unreachable to OSPF as soon as it detects BFD packet failure. This speeds up convergence.

BFD Over OSPFv3 Configuration

This feature enables OSPFv3 to detect its IPv6 neighbor unreachable faster. BFD reports neighbor unreachable to OSPFv3 as soon as it detects BFD packet failure. This speeds up convergence. Refer to the Sun Ethernet Fabric Operating System OSPFv3 Administration Guide for detailed configuration.

BFD Monitoring for BGP Configuration

This feature enables BGP to detect its IPv4 and IPv6 remote neighbor unreachable faster. BFD reports neighbor unreachable to BGP as soon as it detects BFD packet failure. This speeds up convergence. Refer to the Sun Ethernet Fabric Operating System BGP administration Guide for detailed configuration.

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