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Expand Up @@ -3,6 +3,10 @@ title: Analytics.js Frequently Asked Questions
strat: ajs
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## Is it possible to configure Analytics.js to automatically collect IPv6 when available?

Analytics.js doesn't automatically collect IPv6 addresses. If IPv6 is available on the user’s device or network, you must [manually send](/docs/connections/sources/catalog/libraries/website/javascript/identity/#anonymizing-ip) the IPv6 address to Segment. You need to configure your setup to capture and pass the IPv6 address in your event payloads, as the library doesn’t collect it by default.

## Is there a size limit on requests?

Yes, the limit is 32KB per event message. Events with a payload larger than 32KB are accepted by Analytics.js and Segment servers return a `200` response , but the event is silently dropped once it enters Segment's pipeline.
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