Redundancy hub design

[felix.reyner]

hello


i would like to ask, in past i just had 1 hub router and many spoke routers and usually I created /30 between hub and spoke to form adjacency of ospf.

Right now i have 2 hub routers, btw i just have one cable from hub to each spoke, so technically i just could create one vlan to each spoke. Should i make bigger subnet from hub to spoke? Or is there another best practice?

[Hector Gustavo Serrano Gutierrez]

Hello felix.reyner,

When mentioning Hub and Spoke, in what scenario are you using it? (DMVPN, Frame-Relay, etc).

You still need a form of connecting the new Hub to the spokes, being it physically or an overlay technology like a Tunnel in DMVPN.

It is difficult to answer properly with the very few details provided.

Best Regards.

[felix.reyner]

Hi hector,

typically i rent leased line (isp forward L2 mac frame) to connect my hub and spoke, if the spoke is large branch so we have 2 leased line from different provider, but if the spoke is relative small branch, then i just have one. In case i have one or two link, i want to have redundancy hardware design, so if i have schedule to maintenance one of my hub router, it won't interrupt my traffic to another spoke.

[Hector Gustavo Serrano Gutierrez]

Since you are leasing Layer 2 circuits, you may consider making both Hubs and Spokes participate on a single Boadcast domain/subnet. Create 2 of them (using 802.1Q tags) to separete the Broadcast Domains on the Spokes with more than one leased line and avoid dealing with redundancy at Layer 2 and STP.

[felix.reyner]

Hi Hector,

Since my isp is not support QinQ, what do you think the best alternate for my problem?