Load-balance SIP requests across a gateway pool using the Kamailio dispatcher module.
domain: kamailio.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Define destinations in dispatcher.list using the format setid destination flags priority attrs (e.g. weight=, ping_from=).
Load the module and set list_file via modparam(dispatcher, list_file, ...).
Call ds_select_dst(setid, alg) in the routing script to pick a destination and set $du; alg selects the algorithm (4=round-robin, 9=weight-based, 6=random, etc.).
Enable health checks with modparam(dispatcher, ds_ping_interval, seconds) so Kamailio OPTIONS-pings destinations and marks them inactive on failure (requires the TM module).
Handle selection failure (ds_select_dst returns false) in your failure route.
Known gotchas
ds_ping_interval defaults to 0 (disabled) — pings won't run until you explicitly set an interval.
The dispatcher module is stateless and doesn't track call state itself — combine with other modules if you need call-aware routing.
Confirm parameter behavior against your installed Kamailio version — defaults and flag values have shifted across releases.
Give your agent this knowledge — and 15,500+ more routes
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claude mcp add --transport http waymark https://mcp.waymark.network/mcp
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