Supermicro L2, L3 Configuration Manual

L2 / L3 Switches

Internet Protocol (IP)

Configuration Guide

Revision 1.0

Supermicro L2/L3 Switches Configuration Guide

The information in this USER’S MANUAL has been carefully reviewed and is believed to be accurate. The vendor assumes no responsibility for any inaccuracies that may be contained in this document, makes no commitment to update or to keep current the information in this manual, or to notify any person organization of the updates. Please Note: For the most up-to-date version of this manual, please see our web site at www.supermicro.com.

Super Micro Computer, Inc. (“Supermicro”) reserves the right to make changes to the product described in this manual at any time and without notice. This product, including software, if any, and documentation may not, in gf67cbbwhole or in part, be copied, photocopied, reproduced, translated or reduced to any medium or machine without prior written consent.

IN NO EVENT WILL SUPERMICRO BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL,SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR INABILITY TO USETHIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCHDAMAGES. IN PARTICULAR, SUPERMICRO SHALL NOT HAVE LIABILITY FOR ANY HARDWARE,SOFTWARE, OR DATA STORED OR USED WITH THE PRODUCT, INCLUDING THE COSTS OFREPAIRING, REPLACING, INTEGRATING, INSTALLING OR RECOVERING SUCH HARDWARE,SOFTWARE, OR DATA.

Any disputes arising between manufacturer and customer shall be governed by the laws of Santa Clara County in the State of California, USA. The State of California, County of Santa Clara shall be the exclusive venue for the resolution of any such disputes. Super Micro's total liability for all claims will not exceed the price paid for the hardware product.

FCC Statement: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the manufacturer’s instruction manual, may cause harmful interference with radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case you will be required to correct the interference at your own expense.

California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate warning applies only to products containing CR (Manganese Dioxide) Lithium coin cells. Perchlorate Material-special handling may apply. See http://www.dtsc.ca.gov/hazardouswaste/perchlorate/ for further details.

Manual Revision 1.0

Release Date: September 26, 2013

Unless you request and receive written permission from Super Micro Computer, Inc., you may not copy any part of this document.

Information in this document is subject to change without notice. Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.

Supermicro L2/L3 Switches Configuration Guide

Contents

1 IP Configuration Guide .......................................................................................................................... 4

1.1 IP Overview ................................................................................................................................... 4

1.2 Layer 3 Interface ........................................................................................................................... 5

1.2.1 Physical L3 Interface ............................................................................................................. 5

1.2.2 Layer 3 VLAN Interface .......................................................................................................... 7

1.2.3 Loopback Interface ................................................................................................................ 9

1.3 Inter-VLAN Routing ..................................................................................................................... 10

1.4 Static Route ................................................................................................................................. 12

1.5 ARP .............................................................................................................................................. 14

1.6 DHCP ........................................................................................................................................... 16

1.6.1 DHCP Server ........................................................................................................................ 17

1.6.2 DHCP Client ......................................................................................................................... 25

1.6.3 DHCP Relay Agent ............................................................................................................... 27

1.7 VRRP ............................................................................................................................................ 29

Supermicro L2/L3 Switches Configuration Guide

1 IP Configuration Guide

This document describes the system features supported in Supermicro Layer 2 / Layer 3 switch products.

This document covers the system configurations for the below listed Supermicro switch products.

Top of Rack Switches

• SSE-G24-TG4

• SSE-G48-TG4

• SSE-X24S

• SSE-X3348S

• SBM-GEM-X2C

• SBM-GEM-X2C+

• SBM-GEM-X3S+

• SBM-XEM-X10SM

Blade Switches

• SSE-X3348T

The majority of this document applies to the above listed Supermicro switch products. In any particular sub section however, the contents might vary across these product models. In those sections the differences are clearly identified with reference to a particular model(s). If any particular model is not referenced, the reader can safely assume that the content is applicable to all the above listed models.

Throughout this document, the common term “switch” refers to any of the above listed

Supermicro switch models unless a particular model is noted.

1.1 IP Overview

Internet Protocol (IP), the foundation of the IP protocol suite, is a packet-based protocol used for the exchange of data over computer networks. IP is a network layer that contains addressing and control information to allow routing of data packets. IP handles addressing, fragmentation, reassembly, and protocol de-multiplexing.

Supermicro switches support both TCP and UDP at the transport layer for maximum flexibility in services.

• Transmission Control Protocol (TCP) is a connection-oriented protocol built upon the IP layer.

TCP specifies the format of data and acknowledgments used in the transfer of data and also the

Supermicro L2/L3 Switches Configuration Guide

procedures used to ensure that the data arrives in correct order. With TCP, multiple applications on a system can communicate concurrently as it handles all de-multiplexing of the incoming traffic among the application programs.

• With UDP, applications can send messages(also called datagrams) to other hosts on an IP

network without prior setup of transmission channels or data paths. UDP is suitable when error checking and correction is either not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.

The following features of IP implementation in Supermicro switches are covered in this document.

• Layer3 Interface

• Inter-VLAN routing

• Static Route

• ARP

• DHCP

• VRRP

1.2 Layer 3 Interface

The network layer, or Layer 3,handles the routing of data in packets acrosslogical internetwork paths. The data link layer, or Layer 2,contains protocols that control the physical layer (Layer 1) and data framing for transmission on the physical medium. The Layer 2 function of filtering and forwarding data in frames between two segments on a LAN is known as bridging.

Supermicro switches support three types of Layer 3 interfaces.

• The Layer 3VLAN Interface combines the functionality of routing and bridging.

• The physical Layer 3 interface allows the switch to be configured like a traditional router. It is

also referred as a Routed Interface.

• The Loopback Interface is a logical interface that is “always up”. It is not tied to any physical

interface therefore it does not go down unless it is administratively shut down.

The Layer3 interface is used to:

• Allow traffic to be routed between VLANs.

• Provide Layer 3 IP connectivity to the switch.

1.2.1 Physical L3 Interface

The physical Layer 3 interfaces support functionalities similar to a traditional router. Routed ports are physical ports on the switch that act like a router interface with an IP address configured; they do not belong to any VLAN.

Supermicro switches support Secondary IP addresses, which are used when the same physical segment of the switch interface that is connected serves multiple logical networks.

Supermicro L2/L3 Switches Configuration Guide

Step 1

configure terminal

Enters the configuration mode

Step 2

interface

type

interface

-id>

Enters

the interface configuration

Step 3

no switchport

Configure

s the

router port

Step 4

ip address [<ip

address> | <ip

address>/prefix

Configure

s the

IP address.

Follow the steps below to configure a Physical Layer3 Interface.

Step Command Description

interface range <interface-type><interface-id> ….

mode.

1.2.2

interface-type – may be any of the following: gigabitethernet – gi extreme-ethernet – ex

qx-ethernet – qx

1.2.3

interface-id is in slot/port format for all physical interfaces.

To configure multiple interfaces, use the “interface range …” command. To provide a range use a hyphen (-) between the start and end interface numbers. E.g.: int range gi 0/1-10

length] [<subnet-mask>] [secondary]

1.2.4

To provide multiple interfaces or ranges, separate with a comma (,).

E.g.: int range gi 0/1-10, gi 0/20

1.2.5

If multiple interfaces are provided, the next step will perform the particular configuration on all these interfaces.

ip-address – A valid IPv4 address.

ip-address/prefix-length - A valid IPv4

Supermicro L2/L3 Switches Configuration Guide

ddress with a prefix length of value 1

Step 5

end Exi

ts the configuration mode.

Step 6

show

ip interface

Displays the

Layer 3

interface

IP Routing is enabled by default in Supermicro switches.

32.

subnet-mask – A valid IP subnet mask.

1.2.6

Secondary - Assigns multiple IP

addresses to network interfaces.

1.2.7

information.

The “switchport” command deletes the Physical Layer 3 interface and the interface is reset as a Layer2 interface.

The example below shows the commands used to configure a Physical Layer3 Interface.

SMIS# configure terminal SMIS(config)# interface Gi 0/22 SMIS(config-if)# no switchport SMIS(config-if)# ip address 20.20.20.1 255.255.255.0 SMIS(config-if)# end

SMIS# show ip interface

Gi0/22 is up, line protocol is up Internet address is 20.20.20.1/24 Broadcast address is20.20.20.255

mgmt is up, line protocol is down Internet address is 192.168.100.102/24 Broadcast address is192.168.100.255 Gateway 0.0.0.0

1.2.8 Layer 3 VLAN Interface

VLANs typically operate at Layer 2. When aLayer2 VLAN is configured with an IP address, it behaves as a logical Layer 3 VLAN interface. A L3 VLAN interface provides logical routing interfaces to VLANs on Layer

Supermicro L2/L3 Switches Configuration Guide

Step 1

configure terminal

Enters the co

nfiguration mode

Step 2

Create a Layer 2 VLAN and add all required ports.

For details on configuring

Layer 2

Step 3

interface

vlan<vlan

id (1

4069)>

Entersthe

interface configuration mode

Step 4

ip address [<ip

address> | <ip

address>/prefix

Configure

s the

IP address.

Step

5 end Exits the configuration mode.

Step

6 show

ip interface

Displays the Layer 3 interface

The “

no ip address [<ip_addr>]

”

command

deletes the

ayer 3 VLAN interface and

resets

2 switches.It is also called aSwitch Virtual Interface (SVI )and handles processing for all the packets associated with that VLAN.

Follow the steps below to configure a Logical Layer3 Interface.

Step Command Description

VLAN, refer to the ‘VLAN Config. guide’ at www.supermicro.com

to specify the interface to be configured as a Layer 3 interface.

length] [<subnet-mask>] [secondary]

ip-address – A valid IPv4 address.

ip-address/prefix-length - A valid IPv4

address with a prefix length of value 1-

32.

subnet-mask – A valid IP subnet mask.

Secondary - Assigns multiple IP

addresses to network interfaces.

information.

as a Layer2 VLAN.

The example below shows the commands used to configure a Logical Layer3 interface.

SMIS# configure terminal SMIS(config)# vlan 10 SMIS(config-vlan)# ports Gi 0/22 untagged SMIS(config-vlan)# exit

SMIS(config)# interface vlan 10 SMIS(config-if)#ip address 10.10.10.1 255.255.255.0 SMIS(config-if)# end

Supermicro L2/L3 Switches Configuration Guide

Step 1

configure terminal

Enters the configuration mode

Step

2 interface

loopback <interface

id (1

100)>

Enters

interface configuration mode

Step

3 ip address [<ip

address> | <ip

address>/prefix

Configure IP address.

Step 4

no shutdown

Enable the

oopback interface

tep 5

end Exits the configuration mode.

Step

6 show ip interface

Displays the

Layer 3 interface

SMIS# show ip interface

mgmt is up, line protocol is down Internet address is 192.168.100.102/24 Broadcast address is 192.168.100.255 Gateway 0.0.0.0

vlan10 is up, line protocol is up Internet address is 10.10.10.1/24 Broadcast address is 10.10.10.255

1.2.9 Loopback Interface

Supermicro switches support a loopback interface, which is a virtual interface and is not connected to any other device. Loopback interfaces are very useful since they will never go down unless the entire router goes down. This is useful for managing routers because there will always be at least one active interface on the routers: the loopback interface.

Follow the steps below to configure loopback interface.

Step Command Description

specify the interface to be configured as a Layer 3 interface.

length] [<subnet-mask>]

ip-address – A valid IPv4 address.

ip-address/prefix-length - A valid IPv4

address with a prefix length of value 1-

32.

subnet-mask – A valid IP subnet mask.

NOTE: Subnet mask should be 32-bit for loopback interface.

show interface loopback <1-100>

configuration.

Display the loopback interface

Supermicro L2/L3 Switches Configuration Guide

configuration.

IP Routing is not supported on

oopback

nterfaces.

The “nointerface loopback <interface-id (1-100)>” command deletes the loopback interface.

SMIS# configure terminal SMIS(config)# interface loopback 1 SMIS(config-if)# ip address 100.1.1.1/32 SMIS(config-if)# no shutdown SMIS(config-if)# end

SMIS# show interface loopback 1

Interface Status Protocol Description

--------- ------ -------- ----------loopback1upup

SMIS# show ip interface

mgmt is up, line protocol is down Internet address is 192.168.100.102/24 Broadcast address is 192.168.100.255 Gateway 0.0.0.0

loopback1 is up, line protocol is up Internet address is 100.1.1.1/32 Broadcast address is 100.1.1.1

1.3 Inter-VLAN Routing

VLANs enable splitting traffic across several manageable broadcast domains. Devices within a VLAN can communicate with one another without requiring routing. Whenever hosts in one VLAN need to communicate with hosts in another VLAN, the traffic must be routed between them. This is known as Inter-VLAN Routing.

Supermicro switches use application-specific integrated circuits (ASICs), which are hardware chips that can route traffic at very high speeds. These ASICs are installed on the switching engine of a Layer 3 switch, which traditionally switches frames at Layer 2. The ASICs allow the switching engine to also switch frames that contain packets sent between different VLANs. Each ASIC is programmed with the information required to route traffic from one VLAN to another, without having to pass the traffic through the CPU of the routing engine.

Advantages of Inter-VLAN routing in L3 switches:

Supermicro L2/L3 Switches Configuration Guide

To WAN via Router

• Layer 3 switches are much more cost effective than routers for delivering high-speed inter-VLAN

routing.

• Layer 3 switches are enhanced Layer 2 switches, and therefore have the same high port

densities as Layer 2 switches. Routers on the other hand typically have a much lower port density.

• Layer 3 switches can be configured to operate as a normal Layer 2 switch or Layer 3 switch as

required.

Application of Inter-VLAN routing: The network can be divided based on the group or function of itsdevices. For example, an engineering department VLAN would only have devices associated with the engineering department, while an HR VLAN would only have HR related devices. With Inter-VLAN routing, the devices in each VLAN can talk to one another without all the devices being in the same broadcast domain.

VLAN 300

VLAN 100

VLAN 200

Layer3

Figure IP-1: Inter-VLAN Routing

Follow the steps below to configure Inter-VLAN routing.

1. Create two Layer 3 interface VLANs.

2. Configure an IP address for both interfaces of these Layer 3 VLANs.

3. Execute show ip route to check if the VLAN routes specified by VLAN IP address are displayed as

connected routes. The routing table has an entry for each VLAN interface subnet, therefore, devices in VLAN 10 can communicate with devices in VLAN 20 and vice versa.

The example below shows the commands used to configure Inter-VLAN routing.

SMIS# configure terminal

+ 23 hidden pages

Supermicro L2, L3 Configuration Manual

Specifications and Main Features

Frequently Asked Questions

User Manual