With this feature enabled, after an ESM host is created, only the FIRST HTTP request from the host is redirected to a configured URL with specified parameters. Subsequent HTTP requests go through without being redirected.
This feature could be used by service providers to push a web-page to broadband users for purpose of advertisement, announcements, and such.
A one-time-http-redirection filter could be configured in sla-profile, this filter is replaced by an ingress filter in sla-profile after the first HTTP request is redirected. There is also a RADIUS VSA (Alc-Onetime-Http-Redirection-Filter-Id) that could be included in access-accept or CoA request to override CLI configuration. The format of Alc-Onetime-Http-Redirection-Filter-Id is:
Ingr-v4:filter-id; for example, Ingr-v4:1000. If the filter-id is 0, then the system replaces the current one-time-http-redirection filter with ingress filter.
In case of CoA, if the host’s one-time-http-filter has already been replaced then system ignores the Alc-Onetime-Http-Redirection-Filter-Id.
If a 7750 SR receives filter insertion by CoA or access-accept when one-time-http-redirection filter is still active, then the received filter entries are only applied to the ingress filter. And after first HTTP redirection, the updated ingress filter replaces the one-time-http-redirection filter.
This feature only supports IPv4 filters.