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19 Using MLAG in Dell Networks
.
6 Using MLAG with VLT or Cisco vPC
MLAG can also be used in conjuction with similar technologies such as Dell Networking VLT or Cisco vPC
(virtual port-channel), but only in a multi-layer topology. VLT provides the equivalent results as MLAG, but
is available on the FTOS-based Dell Networking switches like the S4810. Each peer pair must use the same
multi-chassis lag feature. This provides the network with the same resiliency and improved bandwidth as
when using MLAG in a multi-tier MLAG-only environment. Figure 7 shows examples of using MLAG peers
on one layer and VLT or Cisco vPC on the other.
LAG
N3048
N3048
Peer-
Link
MLAG
VLTi
S4810
S4810
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
LAG
LAG
N3048
N3048
vPC
Cisco
Cisco
LAG
LAG
LAG
CISCO NEXUS 2232TP 10GE FABRIC EXTENDER
STAT
2526 2728 2930 31321718 1920 2122 2324910 11 12 1314 151612 34 56 78
ID
12 34 56 78
CISCO NEXUS 2232TP 10GE FABRIC EXTENDER
STAT
2526 2728 2930 31321718 1920 2122 2324910 11 12 1314 151612 34 56 78
ID
12 34 56 78
All 4 orange ports
are in the same
port-channel
All 4 green ports
are in the same
port-channel
All 4 orange ports
are in the same
port-channel
All 4 green ports
are in the same
port-channel
Note: Orange and green are
in different port-channels in
both examples
Peer-
Link
MLAG
Multi-layer MLAG with VLT and with Cisco vPC Figure 7
6.1 Unsupported Configurations
Figure 8 and Figure 9 show examples of configurations that are
not supported
. In Figure 8, the first
topology shows an MLAG peer attempting to connect with a Dell VLTi peer. The second topology shows
an MLAG peer attempting to connect with a Cisco vPC (or Cisco VSS) peer. Neither peer configurations
shown in these scenarios are supported.
N3048
Peer-Link
LAG
VLTi
S4810
QSFP+
MASTER
SYS
FAN
PSU
RS-232
ETHERNET
LNK ACT
4644424038363432302826242220181614121086420 48 56
52 60
SFP+
Force10 S4810P
X
Peer-Link
LAG
Cisco
X
vPC
N3048
CISCO NEXUS 2232TP 10GE FABRIC EXTENDER
STAT
25 26 2728 2930 31 3217 18 1920 2122 23 249101112 1314 15 1612 34 56 78
ID
12 3 4 56 78
Unsupported peer configurations Figure 8