Cisco Network Switch Cabling Manuale utente

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 16

Control Node and Network Switch Cabling

Example

This document provides background information and detailed procedures for cabling dual

Cassatt Active Response control nodes and network switches and for configuring those

network switches. These procedures are an example of one way you could cable the control

nodes and configure the switches. If your site setup differs, use this document as a guideline.

Cabling control node and switch hardware

Prerequisites

This example assumes you have completed the following tasks:

•You have obtained all the required hardware.

•You have determined your network address strategy and allocated the required IP

addresses according to network requirements of Cassatt Active Response.

•You have configured your gateway or gateways using the static IP addresses you allocated

from the Cassatt network.

See the

Info Central

site for detailed information on calculating network addresses for

Cassatt Active Response.

Port numbering

You must understand the switch and control node port numbering to cable the Cassatt Active

Response environment’s hardware components together correctly. Figure 1 assumes use of a

Cisco switch and shows switch ports, the switch module ports, and the control node ports. As

an example, this document assumes four network switches intended for use with 24

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 17

application nodes. Note that detailed instructions for adding application nodes are in a

separate document, which you should consult when you are ready to cable application nodes

into your Cassatt Active Response environment. (Figure 1 highlights the control node and

network switches, but also suggests application node cabling.)

Figure 1 Switch Panel and Control Node Cabling

C2-1 C2-P

C2-2

Gb 2 Gb1

Control node 2

C1-1 N9-1N5-1

ISL-1 N21-1 N12-P N3-P

C2-1 N11-1

N7-1N3-1

GW-1 N16-PN23-1 N8-P

Switch stack 1

N20-P

N13-1

N15-1

N17-1

N19-1

N10-1N6-1

ISL-2 N11-P N1-P

N12-1N8-1N4-1 N15-P

N23-P N7-P C2-P

N19-P

N14-1

N16-1

N18-1

N20-1

Switch stack 2

Control node 1

Switch 1

Switch 2

Switch 3Switch 4

11 13 15 17 19 21 23

6810 12 14 16 18 20 22 24

1357911 13 15 17 19 21 23

246810

12 14 16 18 20 22 24

C1-2 N9-2N5-2

ISL-1 N21-2 N10-P N4-P

C2-2 N11-2

N7-2N3-2

GW-2 N22-P

N23-2 N6-P

N18-P

N13-2

N15-2

N17-2

N19-2

N10-2N6-2

ISL-2 N9-P N2-P

N14-2N10- 2N4-2 N13-P

N21-P C1-P

N17-P

N14-2

N16-2

N18-2

N20-2

11 13 15 17 19 21 23

6810 12 14 16 18 20 22 24

1357911 13 15 17 19 21 23

246810

12 14 16 18 20 22 24

C1-1 C1 -P

C1-2

Gb 2 Gb1

N14-P

N5-P

N1-1

N1-2

N2-1

N2-2

N22-1

N22-2

Legend:

Blue = Gateway (GW) Nn-1 = Application node NIC

Yellow = Cisco interswitch link (ISL) Nn-2 = Application node NIC

Green = Control node (C) Nn-P = Application node remote management controller

Red = Remote management controller

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 18

Table 1 shows how each port is used on the switch and control node.

Table 1 Description of Panel and Main Board Notation

Notation Description

ISL-1 Used to create the first half of interswitch link (ISL)

connection between the two Cisco switches.

ISL-2 Used to create the second half of the ISL connection

between the two Cisco switches.

GW-1 Used to create the first connection from the Cisco switch

to the gateway.

GW-2 Used to create the second connection from the Cisco

switch to the gateway.

C1-1 Used to connect the first control node’s first onboard

Gigabit Ethernet connection (Gb 1) into the Cassatt Active

Response environment through the designated switch port.

C1-2 Used to connect the first control node’s first onboard

Gigabit Ethernet connection (Gb 2) into the Cassatt Active

Response environment through the designated switch port.

C2-1 Used to connect the second control node’s second onboard

Gigabit Ethernet connection (Gb 2) into the Cassatt Active

Response environment through the designated switch port.

C2-2 Used to connect the second control node’s second onboard

Gigabit Ethernet connection (Gb 2) into the Cassatt Active

Response environment through the designated switch port.

C1-P Used to connect the first control node remote management

controller into the Cassatt Active Response environment.

C2-P Used to connect the second control node remote

management controller into the Cassatt Active Response

environment.

N1-1 through N23-1 Used to connect application nodes into the Cassatt Active

Response environment.

N2-1 through N23-2 Used to connect application nodes into the Cassatt Active

Response environment.

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 19

Racking and cabling guidelines

To cable your control nodes to the network switches according to Figure 1, follow these

steps. Remember that this sample configuration uses four network switches, so use these

instructions as a guideline for your own configuration.

1. Rack all switches and control node hardware according to the vendor’s documentation

and/or the site policy. For lack of any other policy, rack the heaviest of the following

pieces of equipment on the bottom:

•Cisco switches

•Power distribution units (PDUs)

•Control nodes

•Application nodes

2. Follow the Cisco switch hardware installation instructions and use the StackWise cables

to cable the four switches into two sets of switch stacks, as shown in Figure 2. Once the

two 24-port switches have been stacked, they behave as a single logical 48-port switch.

Figure 2 Stacked Switch Cabling

What about connecting application nodes?

Remaining switch ports can be used to connect application nodes and their remote management controllers

into the Cassatt Active Response environment. In general, distribute the connections evenly between the

switches and the application nodes (both the application node NICs and their associated remote management

controller NICs) For more information, see the

Info Central

site for detailed information on setting

up application nodes.

Switch 1Switch 2

Switch 3

Switch 4

Rear panels

Stack2Stack1

Stack1 Stack2 Stack1 Stack2

Stack1 Stack2

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 20

3. Connect the control nodes to the shared storage hardware, as follows:

4. Using crossover cables, create an interswitch link (ISL) between the two Cisco 3750

switches. The recommended configuration uses two ISL connections between the Cisco

switches for increased bandwidth and redundancy. As suggested in Figure 1, create the

first half of the ISL between the stacked switches, as follows.

•Connect port 1 on switch 1 to port 1 on switch 3.

5. Then create the second half of the ISL between the stacked switches as follows:

•Connect port 1 on switch 2 to port 1 on switch 4.

•Connect port 2 on switch 1 to the edge router to make the first gateway connection.

•Connect port 2 on switch 3 to the edge router to make the second gateway

connection.

6. Using the Cisco switches and control node port information in Figure 1, connect the

control nodes to the switches using category 5 or 6 Ethernet cables. The recommended

configuration uses dual Ethernet connections to each control node for redundancy. Do

this as follows:

•From control node 1's back panel:

- Connect Gb1 port 1, C1-1, into port 3 on switch 1

- Connect Gb2 port 2, C1-2, into port 3 on switch 3

- Connect the remote management controller port, C1-P, into port 24 on switch 4

•From control node 2's back panel:

- Connect Gb1 port 1, C2-1, into port 4 on switch 1

- Connect Gb2 port 2, C2-2, into port 4 on switch 3

- Connect the remote management controller port, C2-P, into port 24 on switch 2

If you are cabling application nodes, you can follow the diagram in Figure 1. For more

application-node specific cabling instructions, see the

Info Central

site.

If... Then...

a SAN is used for shared storage •Insert a Host Bus Adapter (HBA) into each control

node.

•Connect one end of the fiber cable to the HBA and the

other end to your site's SAN.

a NAS and dual-ported disk is used

for shared storage

•Insert the connectivity card required for the dual-

ported disk into each control node.

•Connect the other end of each card to the dual-ported

disk.

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 21

Configuring the switches

After you have racked and cabled the control nodes and switches, you need to configure both

Cisco switch stacks. If you are using another of the Cassatt recommended switches (see the

Info Central

site for recommended switch hardware), use this Cisco switch configuration

as a guideline.

Connecting the switch to a terminal server

To configure the first Cisco Catalyst 3750 Series switch stack to a Lantronix terminal server,

do the following. If you are using another terminal server, use this Lantronix configuration as

a guideline.

1. Unplug the network switches.

1. Connect the switch in a stack to a terminal server.

It may be convenient to connect all switch consoles to the terminal server to avoid the

need to move cables if a switch fails. Follow the switch connector and cable specifications

in the Catalyst 3750 Switch Hardware Installation Guide to determine what type of cable is

needed when connecting the switch for configuration. The RJ-45-to-DB-9 adapter cable

that comes with the switch for this connection was not used for the reference

configuration testing.

Cassatt tested the switch with an RJ-45 cable with reversed pins connected to a Lantronix

ETS terminal server. The following Lantronix port settings were used:

Char Size/Stop Bits: 8/1 Input Speed: 9600

Flow Ctrl: None Output Speed: 9600

Parity: None Modem Control: None

Access: Remote Local Switch: None

Backward: None Port Name: Port_10

Break Ctrl: Local Session Limit: 4

Forward: None Terminal Type: Soft()

Preferred Services: (Lat)

(Telnet)

Authorized Groups : 0

(Current) Groups : 0

Characteristics: Broadcast Loss Notify Verify Remote Conf

Telnet Pad

2. Log into the terminal server.

3. Connect to the Cisco switch via the terminal server console.

Do not configure network switches to enforce a maximum number of Ethernet addresses

learned on an interface. For example, on Cisco switches, do not use “switchport port-

security.” Doing so may prevent Cassatt Active Response from inventorying VMs during the

discovery process.

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 22

4. Plug in the Cisco switches in a stack.

5. Many boot-up and self-test messages will scroll on the console monitor. When the

process is completed, use the following table to determine your next step:

Restoring the factory default settings

To reset the switches in a switch stack to the factory defaults, you must delete the startup

configuration and virtual local area network (VLAN) database files. Execute the following

privileged command sequence to restore the Cisco Catalyst 3750 Series switch configuration

to the original factory setting:

1. Delete the startup configuration and configuration files, as follows:

Erasing the nvram filesystem will remove all configuration

files! Continue? [confirm]y[OK]

Erase of nvram: complete

00:06:43: %SYS-7-NV_BLOCK_INIT: Initalized the geometry of

nvram.

2. Delete the VLAN database, as follows:

If the following displays at the

prompt...

Then...

Continue with configuration

dialog? [yes/no]:

The switch stack is in the factory default state; go to

step 1 in Setting switch options on page 24 to continue

configuring the switch.

Press RETURN to get started!

The switch stack has already been configured and the

switch stack must be restored to the factory settings;

go to step 1 in Restoring the factory default settings on

page 22.

At this prompt... Enter... Notes

sw01> enable

sw01# write erase Displays the following output:

At this prompt... Enter... Notes

sw01# delete flash:vlan.dat

Delete filename [vlan.dat]? Select Enter

Delete flash:vlan.dat? [confirm] y

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 23

3. If the switch was used previously in a switch stack, and is now in a different switch stack,

it may have a switch number other than 1 and 2. To determine if the switch number must

be reset, display the switch configuration as follows:

Current

Switch# Role Mac Address Priority State

--------------------------------------------------------

*1 Master 0011.bb7e.9480 1 Ready

2 Slave 0011.bb25.ce80 1 Ready

Current

Switch# Role Mac Address Priority State

--------------------------------------------------------

*1 Master 0011.bb7e.9480 1 Ready

2 Slave 0011.bb25.ce80 1 Ready

4. Enter the configuration mode, as follows:

Enter configuration commands, one per line. End with CNTL/Z.

5. Renumber the switch, as follows:

WARNING: Changing the switch number may result in lost

or changed configuration for that switch!

At this prompt... Enter... Notes

sw01# show switch Displays the following output:

If... Then...

If a switch number other than 1 and 2 is

indicated in the output

Go to step 4.

If the switch number is 1 and 2 Go to step 7.

At this prompt... Enter... Notes

Switch# configure terminal Displays the following output:

At this prompt... Enter... Notes

sw01# switch 3 renumber 2 Replace 3 with the number

displayed for your switch.

Replace 2 with the number that

is missing.

Displays the following output:

At this prompt... Enter... Notes

Do you want to continue?[confirm] yDisplays the following output:

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 24

Changing Switch Number 3 to Switch Number 2 New Switch Number

will be effective after next reboot

6. Exit the configuration mode, as follows:

7. Halt and perform a cold restart, as follows:

00:08:23: %SYS-5-RELOAD: Reload requested

Base ethernet MAC Address: 00:11:bb:7e:94:80

Xmodem file system is available.

The password-recovery mechanism is enabled.

Initializing Flash...

flashfs[0]: 79 files, 4 directories

flashfs[0]: 0 orphaned files, 0 orphaned directories

flashfs[0]: Total bytes: 15998976

flashfs[0]: Bytes used: 6457856

flashfs[0]: Bytes available: 9541120

flashfs[0]: flashfs fsck took 8 seconds.

...done Initializing Flash.

Boot Sector Filesystem (bs) installed, fsid: 3

done.

...

Press RETURN to get started!

Proceed to step 1 in Setting switch options on page 24 to continue the switch configuration

procedure.

Setting switch options

This procedure provides the minimal configuration required to support the reference system.

Configure the first switch stack as follows:

1. Select the

Enter

key to get started. Skip the initial configuration, as follows:

At this prompt... Enter... Notes

sw01# exit

At this prompt... Enter... Notes

sw01> reload

System configuration has been modified.

Save? [yes/no]:

Proceed with reload? [confirm] yDisplays the following output:

At this prompt... Enter... Notes

--- System Configuration Dialog ---

would you like to enter the initial configuration

dialog? [yes/no]:

CASSATT ACTIVE RESPONSE CONTROL NODE AND NETWORK SWITCH CABLING EXAMPLE 25

2. Enter the privileged mode, as follows:

3. Enter the configuration mode, as follows:

Enter configuration commands, one per line. End with CNTL/Z.

4. Turn the messages off, as follows:

5. Turn off all interfaces on the first switch, as follows:

6. Turn off all the interfaces on the second switch, as follows:

At this prompt... Enter... Notes

Switch> enable

At this prompt... Enter... Notes

Switch# configure terminal Displays the following output:

At this prompt... Enter... Notes

Switch(config)# no logging console Some of the switch configuration

commands can produce many

messages that are logged to the

console, which is often

inconvenient.

At this prompt... Enter... Notes

Switch(config)# interface range GigabitEthernet 1/0/1 – 24 This step is done to prevent

network loops from forming

because the configuration is only

partially enabled at this time.

Switch(config-if-

range)#

shutdown

Switch(config-if-

range)#

exit

At this prompt... Enter... Notes

Switch(config)# interface range GigabitEthernet 2/0/1 – 24 This is done for the same reason as

stated in the previous step.

Switch(config-if-

range)#

shutdown

Switch(config-if-

range)#

exit

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