UK Virgin Media Hub 4 Link Aggregation is very broken (balance-rr)

 Virgin Media in the UK currently offers a "Gig1" service that offers ~1.2Gbps down and 50Mbps up. 

While the topic of mediocre upload speed is valid, that is a discussion for another time. 

Virgin Media Hub 4 modem

While the interface on the HFC interface offers 1.2Gbps downlink bandwidth, the Hub 4 modem itself offers only 4 x 1GbE interfaces, essentially limiting the usable downlink throughput to GbE (in practice ~940Mbps). 

This bloc post covers an undocumented feature, which allows aggregation of multiple GbE ports on the Hub 4, and create a WAN connection that is capable of >GbE speed. 

WARNING: While the bonding is stable with this firmware on Hub 4, the Round Robin (and alb as well) seem to fail for no reason every now and then. This does not seem to be ready for production use. 

Date tested: 2021-01-31

ISP Modem:                     
    Model:                        Virgin Media Hub 4 (ARRIS TG3492LG-VMB)
    Hardware Version:      8
    Software Version:

CPE Equipment:
    Model:                         Mikrotik RB4011iGS+
    Firmware Version:       v6.48


On the ISP Modem side - no configuration needed. 

On the CPE, I created a new bond with the following configuration: 


  1. Hi, I'm looking to copy what you've done here to get the most out of my Gig1 connection. Is there a wireless router you'd recommend that could handle this? Ideally so I could prioritize traffic to an ethernet cable? Specifically to get an uninterrupted stream to use geforcenow. Cheers for posting this. it seems like a few people are struggling to access their entire bandwidth through their CPE equipment on the virgin media forums.

  2. any update on this for newer version of the hub?

    1. no need now... VM are releasing a NEW hub 5 with 2.5GB port :)