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8 Using MLAG in Dell Networks

3 Supported Topologies

MLAG topologies contain several options. They can be a single layer (only one pair of MLAG peer switches)

or two layers (two pair of MLAG peer switches). The peer-link between peers can have anywhere from 1

to 8 active interfaces to create the link. With these and other variables, there are dozens of ways to setup

an MLAG. Table 2 lists all supported topology options.

Topological parameter

Supported options

# of MLAG domains per switch

# of peer switches per MLAG domain

# of interfaces per MLAG

2 to 8

# of interfaces per Peer-Link

1 to 8

# of MLAGs connecting to MLAG domain

Limited only by number of ports available

# of layers

1 or 2

Table 2 Parameters for an MLAG topology

Figure 3 shows just a few examples of MLAG topologies that can be built using the MLAG feature. The red

lines show the peer-lnks between the primary and secondary peer switches.

QSFP+

MASTER

SYS

FAN

PSU

RS-232

ETHERNET

LNK ACT

4644424038363432302826242220181614121086420 48 56

52 60

SFP+

Force10 S4810P

QSFP+

MASTER

SYS

FAN

PSU

RS-232

ETHERNET

LNK ACT

4644424038363432302826242220181614121086420 48 56

52 60

SFP+

Force10 S4810P

2 tier

(2 layer, full mesh)

2 layer (MLAG and VLT)

1 partner switch

3 partner switches

VLTi

2 partner switches

VLTi

Examples of MLAG topologies Figure 3

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 20 21

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