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8 Using MLAG in Dell Networks
.
3 Supported Topologies
MLAGs 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).
Each MLAG domain can have anywhere from 1 to 8 partner switches. The peer-link between peers can
have anywhere from 1 to 8 active interfaces to create the link. Given these variables, there are dozens of
ways to setup an MLAG. Table 2 lists all supported topology options.
Topological parameter
Supported options
# of peer switches per MLAG
2
# of layers
1 or 2
# of partner switches
1 to 8 per MLAG
# of peer-links between peers
1 to 8 active per MLAG (up to 8 more inactive)
Table 2 Optional 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