Dell N2048, N3024 manual Using Mlag with VLT or Cisco vPC, Lag

6Using 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 LAG

S4810 VLTi S4810 Cisco vPC Cisco

All 4 green ports are in the same port-channel

N3048	LAG	Peer-
		Link
		MLAG

	All 4 orange ports		All 4 green ports				All 4 orange ports
	are in the same		are in the same				are in the same
	port-channel		port-channel				port-channel
LAG	N3048		N3048	LAG	Peer-	LAG	N3048
					Link
		Note: Orange and green are			MLAG
		in different port-channels in
		both examples

Figure 7 Multi-layer MLAG with VLT and with Cisco vPC

6.1Unsupported 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.

S4810	X	N3048	Cisco		X	N3048
VLTi				vPC
	Peer-Link				Peer-Link
	LAG				LAG

Figure 8 Unsupported peer configurations

19 Using MLAG in Dell Networks

.