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Published byJose Barton Modified over 11 years ago
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BDL-UDL Load Balancing a.k.a Policy Routing husni tokyo, 2003/06/20
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What is Policy Routing? Small userland program running on FreeBSD to load balance the traffic in AI 3 network –redirect some traffic from BDL to UDL –no action is required at downstream
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What Does It Do?
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Prefix advertisement flow
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Traffic flow before p-route
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Traffic flow after p-route
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O/S Requirements FreeBSD 4.5-RELEASE ~ Kernel options –IPFIREWALL –IPDIVERT –IPFIREWALL_FORWARD –IPFIREWALL_DEFAULT_TO_ACCEPT Tunnel interface –gif0
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P-route System
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Process Flow
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Policy Manager Current: static Next: adaptive –traffic pattern –UDL usage policy (multicast is preferred)
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Operation Status ITB –E-mail; HTTP; Squid AIT –still not running –UDL is unstable?
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Before and After P-Route
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Todays Traffic
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