Hi. I have a situation where it seems the 'zph_sibling' is not tagging traffic with it's defined ToS mark. I have two units configured to be siblings of each other. Both have the Digest and Proxy options enabled. I have a simple enough zph enabled; {{{ zph_mode tos zph_local 0x30 zph_sibling 0x31 }}} I can see traffic tagged as 0x30 from both units however, I see no traffic marked with 0x31. Nothing at all. The closest reference to my issue is here, http://www.squid-cache.org/mail-archive/squid-users/201201/0364.html Any suggestions appreciated. Many Thanks, Nick -- Nick Fennell nick@xxxxxxxx