I have a very basic question; can I transport Q-in-Q traffic through switches that only understand dot1q traffic and not Q-in-Q??
My intention is to use Cisco Small Bussiness switches, which don't understand Q-in-Q, for the transport network and Cisco SPS switches, which do support Q-in-Q, for the access network. Cisco SPS switches will encapsulate customer's VLANs, C-VLANs, into the unique VLAN assigned to the customer, S-VLAN. Cisco Small Business switches will deal only with S-VLANs.
However, Cisco Small Business switches will be able to transport S-VLAN? I have read that S-VLANs have ethertype 0x88a8 so if the transport switches don't understand that ethertype, will they be able to transport it?
However, trunking will probably not work while the type is not recognized as dot1q. This means you can only forward such packets within a single vlan i.e. you will be unable to separate traffic from multiple customers.
You may be able to use it for a single customer but for a bigger environment, it will not scale and you may end up mixing traffic from different customers .
In any case, I am not sure if i would have the issue with the ethertype.
The access switch that encapsulates dot1q traffic in q-in-q traffic (switchport mode dot1q-tunnel) will also provide a trunk of service provideer VLANs (switchport mode trunk) towards distribution switches. I'm not sure that those traffic would have the q-in-q ethertype or the clasicall dot1q trunk ethertype. In the second case we shouldn't have any problem.
Listen: https://smarturl.it/CCRS8E37Follow us: twitter.com/ciscochampionSometimes, situations require temporary fixes. Sometimes, the network becomes an afterthought in overall office design and planning. In either situation, it may require netw...
In this special edition of the Insider Series, we hear from Cisco partners who have taken steps to be more eco-friendly and sustainable. We hear what inspires ASHRAE, Southwire, Igor, and NTT to create a workplace that is centered around people and how th...
We know that the Type-1 LSA describes the link type connected to the router, the neighbor router and the subnet number.In this topology, assume we dont have a Type-2 LSA, so each router will create its own Type-1 LSA, the Type-1 LSA will describe the neig...
Here are some commonly asked questions and answers to help with your adoption of Cisco DNA Center Wireless. Subscribe to this post to stay up-to-date with the latest Q&A and recommended Ask the Experts (ATXs) sessions to attend.
Q. I have a Cisco Appl...
Why IETF changed and inverted OSPF Type-7 LSA VS Type-5 LSA election In RFC 3101 compared to OLD RFC 1587?Many people learns that the Type-7 LSA and Type-5 election (ON Versus OE routes) depends on RFC 3101 for NSSA published in 2003 and RFC 1587 for NSSA...