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TheySeeMeRouting
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CCR1072-1G-8S+, GRE, slow RX on the client

Mon Apr 16, 2018 3:50 pm

Hello,

consider the following setup using the CCR1072-1G-8S+ with the latest software and firmware.

10.0.0.0/30 (10G Fiber Transit Provider #1 on Port 1)
10.0.1.0/30 (1G Copper Transit Provider #2 on Port 3 via a RJ45 SFP+ adapter)

Scenario #1: (only one port, Transit Provider #1, is used)
GRE Tunnel Server Address: 10.0.2.1/24
GRE Tunnel Client Address: 10.0.2.2/24

The GRE tunnel user connects to an IPv4 address, let's assume 8.8.8.8, announced over Transit Provider #1. Let's assume you route 9.9.9.0/24 over 10.0.2.2 in that GRE tunnel. This will result in a very fast download speed and a very fast upload speed for the GRE user where he can max out his 1G Port.

Scenario #2: (two ports are used concurrently)
GRE Tunnel Server Address: 10.0.2.1/24
GRE Tunnel Client Address: 10.0.2.2/24

The GRE tunnel user connects to an IPv4 address, let's assume 9.9.9.9, announced over Transit Provider #2. Let's assume you route 8.8.8.0/24 announced over Transit Provider #1 over 10.0.2.2 in that GRE tunnel. This will result in a very slow download speed, around 50-100 Mbps, and a very fast upload speed for the GRE user. In uploads he can max out his 1G Port. Enabling Torch makes downloading faster.

Scenario #3: (only one port, Transit Provider #2, is used)
GRE Tunnel Server Address: 10.0.2.1/24
GRE Tunnel Client Address: 10.0.2.2/24

The GRE tunnel user connects to an IPv4 address, let's assume 8.8.8.8, announced over Transit Provider #2. Let's assume you route 9.9.9.0/24 over 10.0.2.2 in that GRE tunnel. This will result in a very fast download speed and a very fast upload speed for the GRE user where he can max out his 1G Port.


Using GRE or L2TP yields the same results in both scenarios and no encryption is used, the Router is barely using the CPUs. The Goal is to announce subnets over Transit Provider #1 and have users connect over Transit Provider #2 and then route subnets, announced from Transit Provider #1, over the Tunnel established with Transit Provider #2.

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