configure ip static routes - microchip...

Application Note ENT-AN1113

Configure IP Static Routes

An IP address identifies a device on an IP network. The IP version 4 (IPv4) address is 32 bits long. AnIPv4 address can only be assigned through a VLAN interface. The address can be set manually (called astatic IP) or automatically by using the DHCP protocol. For more information, see Configure the DHCPClient. The switch application software implements software to handle static IPv4 routing.

Table of Contents

Traditional NetworkRouting involves both a TCP/IP host and an IP router. The following illustration shows the configurationfor a traditional network with two IP networks and a router. Each IP network needs to have an IP addressassigned and a gateway where packets can be forwarded to.

Traditional Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Using a VLAN-Aware Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Using a Layer 3 Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Configuration using ICLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Configuration using the WebGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Connecting Two L3 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Configuration of the Left Switch using the WebGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 1 • IP Routing using a Router and Switches

Router

Interface A10.0.1.1/24

No-config

IP: 10.0.1.2/24GW: 10.0.1.1

L2-switch

HOSTA

HOSTB

L2-switch

Interface B10.0.2.1/24

No-config

IP: 10.0.2.2/24GW: 10.0.2.1

July 2015 1

© 2015 Microsemi Corporation

Configure IP Static Routes Configure IP Static Routes

Using a VLAN-Aware SwitchThe following illustration shows the same network configured to use a VLAN-aware switch. Using VLANsis a method of separating flows within the same switch.

Using a Layer 3 SwitchThe following illustration shows the same network configured to use an L3 switch.

IP routing is fundamentally a destination-driven process. All frames that enter the router are inspected todetermine the destination IP address. Based on that address the router looks up the routing table todetermine where to send the frame.

Configuration using ICLIThe following steps implement the configurations using the command line interface.

1. Step 1: Create VLAN 1001 and 1002 to separate the two IP networks

Switch# configure terminalSwitch(config)# vlan 1001Switch(config-vlan)# vlan 1002Switch(config-vlan)# exit

Figure 2 • IP Routing using a Router and VLAN-Aware Switch

Router

L2-switch

HOSTA

HOSTB

IP: 10.0.1.2/24GW: 10.0.1.1

VLAN: 1001PVID: 1001

Interface A10.0.1.1/24

IP: 10.0.2.2/24GW: 10.0.2.1


Interface B10.0.2.1/24

Figure 3 • IP Routing using a Router and L3 Switch

L3-switch

Router leg A:IP: 10.0.1.1/24

VLAN: 1001

Router leg B:IP: 10.0.2.1/24

VLAN: 1002



IP: 10.0.1.2/24GW: 10.0.1.1 IP: 10.0.2.2/24

GW: 10.0.2.1HOST

AHOST

B

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Configuration using the WebGUIConfiguration using the WebGUI

2. Step 2: Define the port VLAN for each port by using the switchport access vlan commandto specifiy the VLAN for each interface. Untagged frames are then classified to this VLAN.

Switch(config)# interface GigabitEthernet 1/1Switch(config-if)# switchport access vlan 1001Switch(config-if)# exitSwitch(config)# interface GigabitEthernet 1/2Switch(config-if)# switchport access vlan 1002Switch(config-if)# exit

3. Step 3: Configure router leg A and B by using the ip address command to set primary IPaddress for the interfaces.

Switch(config)# interface vlan 1001Switch(config-if-vlan)# ip address 10.0.1.1 255.255.255.0Switch(config-if-vlan)# exitSwitch(config)# interface vlan 1002Switch(config-if-vlan)# ip address 10.0.2.1 255.255.255.0Switch(config-if-vlan)# end

Configuration using the WebGUIThe following illustration shows the configuration using the web-based interface.

1. Step 1: Create VLAN 1001 and 1002, and define the port VLAN for each port.

Figure 4 • VLAN Port Configuration

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2. Step 2: Configure router leg A and B to set primary IP address for the interfaces.

Connecting Two L3 SwitchesThe following illustration shows how two L3 switches can be interconnected.

The following steps implement the configurations using the command line interface.

1. Step 1: Create VLAN 100, 1001, and 1002. Set up port VLAN for each port on the left switch.

Switch-left# configure terminal

Figure 5 • Router IP Configuration

Figure 6 • IPv4 Static Route

L3-switch

Route add10.1.0.0/16 via 20.0.0.2


VLAN:1001


VLAN:1002

Router leg C:IP: 20.0.0.1/24

VLAN:200

VLAN: 1001PVID: 1001 HOST

AHOST

B

IP: 10.0.2.2/24GW:10.0.2.1

IP: 10.0.1.2/24GW:10.0.1.1

VLAN: 100PVID: 100



VLAN: 200PVID: 200

L3-switch

HOST A

HOST B

IP: 10.1.1.2/24GW:10.1.1.1

IP: 10.1.2.2/24GW:10.1.2.1

Route add10.0.0.0/16 via 20.0.0.1


VLAN:1001


VLAN:1002

Router leg C:IP: 20.0.0.2/24

VLAN: 200


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Connecting Two L3 SwitchesConnecting Two L3 Switches

Switch-left(config)# vlan 100Switch-left(config-vlan)# vlan 1001Switch-left(config-vlan)# vlan 1002Switch-left(config-vlan)# exitSwitch-left(config)# interface GigabitEthernet 1/1Switch-left(config-if)# switchport access vlan 1001Switch-left(config-if)# exitSwitch-left(config)# interface GigabitEthernet 1/2Switch-left(config-if)# switchport access vlan 1002Switch-left(config-if)# exitSwitch-left(config)# interface GigabitEthernet 1/8Switch-left(config-if)# switchport access vlan 100Switch-left(config-if)# exit

2. Step 2: Configure router leg A, B, and C to set IP address for each interface on the left switch.

Switch-left(config)# interface vlan 1001Switch-left(config-if-vlan)# ip address 10.0.1.1 255.255.255.0Switch-left(config-if-vlan)# exitSwitch-left(config)# interface vlan 1002Switch-left(config-if-vlan)# ip address 10.0.2.1 255.255.255.0Switch-left(config-if-vlan)# exitSwitch-left(config)# interface vlan 100Switch-left(config-if-vlan)# ip address 20.0.0.1 255.255.255.0Switch-left(config-if-vlan)# exit

3. Step 3: Configure IP route on the left switch by using the ip route command to add a staticroute entry with next-hop set to 20.0.0.2.

Switch-left(config)# ip route 10.1.0.0 255.255.0.0 20.0.0.2Switch-left(config)# end

4. Step 4: Show the static route’s for the left switch.

Switch-left# show ip route0.0.0.0/0 via 10.10.132.1 <UP GATEWAY HW_RT>10.0.1.0/24 via interface index 200001001 <UP HW_RT>10.0.2.0/24 via interface index 200001002 <UP HW_RT>10.1.0.0/16 via 20.0.0.2 <UP GATEWAY HW_RT>10.10.132.0/23 via interface index 200000001 <UP HW_RT>127.0.0.1/32 via 127.0.0.1 <UP HOST>Switch-left#

5. Step 5: Create VLAN 200, 1001, and 1002. Set up port VLAN for each port on the right switch.

Switch-right# configure terminalSwitch-right(config)# vlan 200Switch-right(config-vlan)# vlan 1001Switch-right(config-vlan)# vlan 1002Switch-right(config-vlan)# exitSwitch-right(config)# interface GigabitEthernet 1/1Switch-right(config-if)# switchport access vlan 1001Switch-right(config-if)# exitSwitch-right(config)# interface GigabitEthernet 1/2Switch-right(config-if)# switchport access vlan 1002Switch-right(config-if)# exitSwitch-right(config)# interface GigabitEthernet 1/8Switch-right(config-if)# switchport access vlan 200Switch-right(config-if)# exit

6. Step 6: Configure router leg A, B, and C to set IP address for each interface on the right switch.

Switch-right(config)# interface vlan 1001Switch-right(config-if-vlan)# ip address 10.1.1.1 255.255.255.0Switch-right(config-if-vlan)# exitSwitch-right(config)# interface vlan 1002Switch-right(config-if-vlan)# ip address 10.1.2.1 255.255.255.0

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Switch-right(config-if-vlan)# exitSwitch-right(config)# interface vlan 200Switch-right(config-if-vlan)# ip address 20.0.0.2 255.255.255.0Switch-right(config-if-vlan)# exit

7. Step 7: Configure IP route on the right switch by using the ip route command to add a staticroute entry with next-hop set to 20.0.0.1.

Switch-right(config)# ip route 10.0.0.0 255.255.0.0 20.0.0.1Switch-right(config)# end

Configuration of the Left Switch using the WebGUIThe following illustration shows the left switch configuration using the web-based interface.

Figure 7 • Left Switch Configuration

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VPPD-03594. 1.2. July 2015

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