Despite contrary opinions, SD-WAN isn’t replacing MPLS anytime soon and MPLS is actually still growing.

That’s according to most of a panel of top SD-WAN suppliers who participated in this week’s SD-WAN Thunderdome at the Channel Partners Conference & Expo. Matthew Toth, founder/president of C3 Technology Advisors, moderated the panel.

The panelists included:

SD-WAN vs. MPLS

Matthew Toth

Toth said he’s surprised that, when asked about SD-WAN versus MPLS, there are still supporters of MPLS.

“I thought that had died a death or was on life support,” he said. “But some of these guys think there are still scenarios where that could be useful.”

Many enterprises are resistant to change and have heavily invested in MPLS over the years.

“And it takes some years to roll out the technology itself,” added Toth. “So I think it’s going to be around for awhile. I think it’s going to be a slow, trickle down to nothing. But for some of those enterprise organizations that are resistant to change, it could be around for a bit.”

Norton said there are still customers who will buy MPLS and layer SD-WAN on top of it. Douglass also said it’s an “emotional decision,” and it’s not possible to convince everyone to move away from MPLS.

Wood said many service providers Versa works with made major investments in networks, and MPLS is working really well for them. Moreover, MPLS offers diversity.

“Believe it or not, MPLS is still growing,” he said. “There’s room for both. MPLS will continue for some time.”

However, Livesay said MPLS should die. None of Aryaka‘s customers uses MPLS.

“MPLS replacement is definitely our No. 1 use case,” he said.

Packet vs. Session Routing

Toth said he was also surprised when the panelists didn’t agree that packet-based routing is better than session-based routing.

“I’ve always been under the impression that packet-based routing is better than session-based routing,” he said. “So when people tell me,  ‘Well, it kind of depends, if one is better than the other, then I’m just going to throw all of my traffic over one.’ I thought that would be more packet-based versus session-based.”

Douglass said there’s room for both packet-based and session-based routing depending on what the customer wants. Norton said it depends on use case, and Wood said there are cases to be made for the benefits of both.

“At Aryaka, it’s largely both,” Livesay said. “We have a combination of packet-and session-based routing.”

When asked whether they have been negatively impacted by the ongoing chip shortage, the panelists agreed it hasn’t disrupted their business, although Douglass said there’s “been some pain” on the Cisco side. CBTS’ communications practice portfolio includes Cisco SD-WAN as a service.