Chapter 10 Interface

• Trunks manage load balancing between interfaces.

Port groups, trunks, and the auxiliary interface have a lot of characteristics that are specific to each type of interface. They are discussed in more detail in Section 10.3.1 on page 194, Chapter 11 on page 219, and Section 10.7.1 on page 215, respectively. The other types of interfaces--Ethernet, VLAN, bridge, PPPoE/PPTP, and virtual--have a lot of similar characteristics. These characteristics are listed in the following table and discussed in more detail below.

Table 43 Ethernet, VLAN, Bridge, PPPoE/PPTP, and Virtual Interfaces Characteristics

CHARACTERISTICS

ETHERNET

VLAN

BRIDGE

PPPOE/PPTP

VIRTUAL

Name*

gex

vlanx

brx

pppx

**

 

 

 

 

 

 

IP Address Assignment

 

 

 

 

 

 

 

 

 

 

 

static IP address

Yes

Yes

Yes

Yes

Yes

DHCP client

Yes

Yes

Yes

Yes

No

routing metric

Yes

Yes

Yes

Yes

Yes

Interface Parameters

 

 

 

 

 

 

 

 

 

 

 

bandwidth restrictions

Yes

Yes

Yes

Yes

Yes

packet size (MTU)

Yes

Yes

Yes

Yes

No

DHCP

 

 

 

 

 

 

 

 

 

 

 

DHCP server

Yes

Yes

Yes

No

No

DHCP relay

Yes

Yes

Yes

No

No

Ping Check

Yes

Yes

Yes

Yes

No

 

 

 

 

 

 

*- The format of interface names is strict. Each name consists of 2-4 letters (interface type), followed by a number (x, limited by the maximum number of each type of interface). For example, Ethernet interface names are ge1, ge2, ge3, ...; VLAN interfaces are vlan0, vlan1, vlan2, ...; and so on.

**- The names of virtual interfaces are derived from the interfaces on which they are created. For example, virtual interfaces created on Ethernet interface ge1 are called ge1:1, ge1:2, and so on. Virtual interfaces created on VLAN interface vlan2 are called vlan2:1, vlan2:2, and so on. You cannot specify the number after the colon(:) in the web configurator; it is a sequential number. You can specify the number after the colon if you use the CLI to set up a virtual interface.

10.1.2 IP Address Assignment

Most interfaces have an IP address and a subnet mask. This information is used to create an entry in the routing table.

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