extreme - ena - eaps

7/28/2019 Extreme - Ena - Eaps

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Ethernet Automatic Protection

Switching (EAPS)ENA 12.6: Switch Operation,

Configuration and Management

2011 Extreme Networks, Inc. All rights reserved


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EAPS

Student Objectives

Identify the EAPS ring elements.

Describe the EAPS domain and VLAN relationship.

Identify the control VLAN configuration rules.

Describe EAPS MAC address and flush-FDB MAC address.

Describe EAPS fault detection.

Describe EAPS fault restoration. Identify the steps to create an EAPS ring.

Configure EAPS.

Verify the EAPS configuration and status

Slide 2


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Ethernet Automatic Protection Switching

EAPS is a simple Layer 2 loop prevention protocoldesigned to operate in networks where fast failover is

essentialEAPS is ideal for:

Service providers providing resilient Ethernet transport for customers

Data centers requiring an always on resilient service

Enterprise customers with a Voice Over IP infrastructure

EAPS Provides:

Sub 50 millisecond failover which is virtually undetectable by end-users

Easy to setup and understand

Point and click provisioning from within Ridgeline

Simple configuration steps from within the CLI

Centralized management when using Ridgeline

Predictable operation

Slide 3


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EAPS OverviewEAPS

ENA 12.6: Switch Operation, Configuration and Management


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Standard Enterprise Design

Identify the network loops

Slide 5

Data Center - Core

Data Center Server Farm

Floor 1 - Edge

SummitStack1 SummitStack3SummitStack2

SummitX450e

SummitStack4

SummitX450e SummitX450e SummitX450e

SummitX650

Top of Rack Switch

SummitX650Top of Rack Switch

1st Network Loop

2nd Network Loop

3rd Network Loop

Floor 2 - Edge

BD8K1 BD8K2


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Standard Enterprise Design with EAPS

EAPS domain created for each network loop

Slide 6

Data Center - Core


Floor 1 - Edge


SummitX450e

SummitStack4


SummitX650

Top of Rack Switch


EAPS Domain #1

EAPS Domain #2

EAPS Domain #3

Floor 2 - Edge

BD8K1 BD8K2


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Standard Enterprise Design with EAPS

EAPS elements added for each domain: node type, primary andsecondary ports (secondary port on the master will block)

Slide 7

Data Center - Core


Floor 1 - Edge

Floor 2 - Edge


SummitX450e

SummitStack4


SummitX650

Top of Rack Switch


EAPS Domain #1

EAPS Domain #2

EAPS Domain #3

1:1 4:1

BD8K1 BD8K2


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EAPS Domain and VLAN Relationship

Each link can carry one or more domains.

For every EAPS domain, a control VLAN needs to becreated to carry all EAPS control traffic.

An EAPS domain can contain several protected VLANs.

Slide 8


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EAPS OperationEAPS



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EAPS Operation - Configuration

Each switch in the domain is configured with the following elements:

Node type

Primary & secondary ports

Control VLAN

The Master node is responsible for transmitting hello packets

Transmitted through the primary port (default setting)

Slide 10

Data Center - Core

Floor 1 - Edge

SummitStack1 SummitStack3SummitStack2 SummitStack4

BD8K

EAPS Domain #2

hello packet

BD8K1 BD8K2


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EAPS Hello (Heath Check) packets

EAPS uses the Extreme Encapsulation Protocol (EEP) to transmithello packets

EEP packets have a source MAC address of 00 e0 2b 00 00 01

EAPS packets have a destination MAC address of 00 e0 2b 00 00 04

Each switch (node) will examine the hello packet and then forward thepacket to its neighbor switch through the ring port that did not receivethe packet

EAPS packets are sent with an 802.1p value of 7 (QP8)

EAPS hello packets contain the following information:

Packet type

Health, Link Down, Links Up (Pre-Forwarding), Flush FDB

Control VLAN ID

Originators system MAC address

Hello fail timer value

Domain state

Complete, Failed

Hello sequence number

Slide 11


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EAPS Operation

The master node transmits hello packets within the control VLANevery second

Defined by the EAPS domains hello timer

Default is 1 second

Values are from 100 milliseconds to 15 seconds

Slide 12

Data Center - Core

Floor 1 - Edge


EAPS Domain #2chk

BD8K1 BD8K2


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EAPS Operation Link Failure

On detecting a link failure, the transit node transmits a links downpacket through its other ring port

The master declares the domain has failed and unblocks itssecondary port sending a flush FDB packet out both ring ports

The master continues to transmit hello packets

Slide 13

Data Center - Core

Floor 1 - Edge


EAPS Domain #2chk

x

dwn

dwnflsh flsh

BD8K1 BD8K2


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EAPS Operation Link Restoration

On link restoration, the transit node transmits a pre-forwardingpacket through its other ring port. The domain state is links up

The master continues to transmit hello packets and waits until itreceives a hello packet before it declares the domain complete

The master then blocks its secondary port and sends a flush FDBpacket and then continues to transmit hello packets

Slide 14

Data Center - Core

Floor 1 - Edge


EAPS Domain #2chk

x

pre

preflsh flsh

BD8K1 BD8K2


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EAPS Operation Fail Timer (Send Alert)

If three hello packets fail to be received by the master, the domainstate will be as follows:

If the domain was previously complete, it will remain in a complete state but

with a fail timer expired

If the domain has just been enabled it will be in an init state but with a fail timer

expired

Slide 15

Data Center - Core

Floor 1 - Edge


EAPS Domain #2chk

BD8K1 BD8K2


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EAPS Operation Fail Timer (Unblock Port)

If three hello packets fail to be received by the master, the domainwill be marked as failed

The master unblocks its secondary port sending a flush FDB packetout both ring ports

The master continues to transmit hello packets

Slide 16

Data Center - Core

Floor 1 - Edge


EAPS Domain #2chkflsh flshchk

BD8K1 BD8K2


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Configuring EAPSEAPS


S C f S


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EAPS Configuration Steps

VLAN Configuration

1. Ensure any VLANs to be protected by EAPS contain the tagged ring ports for

each domain created

2. Create a control VLAN for each domain and ensure they contain the tagged

ring ports for each specific domain (Maximum of 2 ports in each control

VLAN)

EAPS Configuration

1. Create an EAPS domain2. Configure one switch as a master node. All other switches will be transit

nodes

3. Configure the primary port and secondary port for each switch

4. Add the designated control VLAN to the EAPS domain

5. Add the protected VLANs to the EAPS domain

6. Enable the EAPS domain

7. Repeat steps 1 through 6 for each EAPS domain required

8. Finally enable EAPS globally

Slide 18

EAPS C fi ti O i (D i #2)


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The control VLAN (VLAN ctrl-2will have a tag of 102

Ports 1:1 and 4:1 for the SummitStacks will be added to the ctrl-2 VLAN as tagged ports

Ports 1:1 and 2:1 for the BD8Ks will be added to the ctrl-2 VLAN as tagged ports

The protected VLAN (VLAN data) has a tag of 10

The above ports must be added tagged to the data VLAN on each switch, along with any

end-user ports. End-user ports are usually untagged.

VLAN: ctrl-2

802.1Q Tag: 102

EAPS Domain: ed-2

EAPS Configuration Overview (Domain #2)

Slide 19

Data Center - Core

Floor 1 - Edge


EAPS Domain #21:1 4:1 1:1 4:1 1:1 4:1 1:1 4:1

1:1

2:1

1:1

2:1

BD8K1 BD8K2

C fi i EAPS (S itSt k2) 1


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Configuring EAPS (SummitStack2) - 1

To create an EAPS domain:

create eaps

To configure the EAPS mode: configure eaps

mode [master | transit]

To configure the ring ports:

configure eaps primary

configure eaps

secondary

To configure the control VLAN:

configure eaps add control

To add the protected VLANs:

configure eaps

add protected

Slide 20



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To enable an EAPS domain:

enable eaps

To enable EAPS globally: enable eaps

To verify EAPS globally:

show eaps

To verify the EAPS domain:

show eaps

Slide 21



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To rename an EAPS domain:

configure eaps name

To change the ring ports:

disable eaps

unconfigure eaps primary

unconfigure eaps

secondary Remember to re-enable EAPS when the

new ring ports have been assigned

To configure the fail timer expiryaction:

configure eaps

failtime expiry action [send-alert | open-secondary-port]

To verify the changes:

show eaps

Slide 22

EAPS


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EAPS

You should now:

Be able to identify the EAPS ring elements

Understand the EAPS domain and VLAN relationship Know the control VLAN configuration rules

Know the EAPS MAC address

Understand EAPS fault detection

Understand EAPS fault restoration Be able to identify the steps to create an EAPS ring

Be capable of configuring EAPS

Know how to verify the EAPS configuration and status

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