I met a problem recently, I have spent many time to solve it but unfortunately I still have no clue to solve it. below is the appearance of problem:
1. We have a dmvpn network, the HUB and the SPOKE are in the different city. the server is connected to HUB router and the client is connected to the SPOKE router. both router are cisco router.
2. I test the bandwidth with iPerf tool between client and server, the result is strange, the download rate is 20Mbits/s and the upload rate is 80Mbits/s on client, the transport rate is no symmetry.
3. If I bypass the DMVPN network, but still use the same internet link to public network, the downaload rate and upload rate both are 90Mbits/s, that means there is no rate limitation on the outside link.
do you have any idea why the DMVPN has such asymmetry performance ?
hard to say...can you post the configs of both the hub and the spoke ? How many spokes are connected to the hub ?