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Thread: 2 DSL modems, 1 circuit?

  1. #1
    Junior Member
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    Question 2 DSL modems, 1 circuit?

    I'm a new employee here, in charge of telecommunications and network, etc. There is little knowledge left here after my predecessor left... and I've found something weird.

    I have two DSL modems, used for ~300 end-user desktops to get regular internet access. The two modems are on the *same* circuit ID.

    They have IP addresses one next to the other, talking to the same upstream router on the same /24. When latency spikes on one, it spikes on the other. Its working but we're not getting our service guarantee of 2.5/768 times two.

    But how is it working? Is it even possible to have 3 DSL nodes (2 modems plus DSLAM) on the same line? Am I really getting the same 2.5/768, just with two DSL bridges?

    Verizon tech support confirms this is the configuration, but of course Verizon business tech support can't find their prosterior with two hands and a map...

    Any insight appreciated.

  2. #2
    Moderator YeOldeStonecat's Avatar
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    Are they being load balanced/failover on a multi-WAN router?
    MORNING WOOD Lumber Company
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  3. #3
    Junior Member
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    Quote Originally Posted by YeOldeStonecat View Post
    Are they being load balanced/failover on a multi-WAN router?
    No, they are being treated as separate links (some internal subnets have one as a default route, others have the other).

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