Rewrite Rule

[Maile Halatuituia]

Hi I have this Cisco-AVPair = "acct-input-octets-ipv6=xxx" on my radius acct-request packet coming from my Cisco BRAS.
I want to rewrite it to something like this acct-input-octets-ipv6=xxx on my preacct section of my default server (/etc/freeradius/sites-available/default) config and update my request .....
I have this policy already

if( &Cisco-AVPair[*]=~/\(acct-input-octets-ipv6\)=\(\d+)/ ) {
                        update request {
                                &acct-input-octets-ipv6 := "%{2}"
                        }
                }

But seems it doing nothing. Maybe my regex above is wrong or something but that's why I ask .
Here is the portion of my freeradius -X I think it is relevant to this question.

# Executing section preacct from file /etc/freeradius/sites-enabled/default
(2)   preacct {
(2)     policy acct_counters64.preacct {
(2)       update request {
(2)         WARNING: Can't find &Acct-Input-Gigawords.  Using 0 as operand value
(2)         EXPAND %{expr:(&Acct-Input-Gigawords << 32) | &Acct-Input-Octets}
(2)            --> 52
(2)         &Acct-Input-Octets64 = 52
(2)         WARNING: Can't find &Acct-Output-Gigawords.  Using 0 as operand value
(2)         EXPAND %{expr:(&Acct-Output-Gigawords << 32) | &Acct-Output-Octets}
(2)            --> 92
(2)         &Acct-Output-Octets64 = 92
(2)       } # update request = noop
(2)     } # policy acct_counters64.preacct = noop
(2)     [preprocess] = ok
(2)     if ( &User-Name !~ /\@/ ) {
(2)     if ( &User-Name !~ /\@/ )  -> FALSE
(2)     update request {
(2)       EXPAND %{expr: %l - %{%{Acct-Session-Time}:-0} - %{%{Acct-Delay-Time}:-0}}
(2)          --> 1541032848
(2)       &FreeRADIUS-Acct-Session-Start-Time := Nov  1 2018 13:40:48 +13
(2)     } # update request = noop
(2)     policy acct_unique {
(2)       update request {
(2)         Tmp-String-9 := "ai:"
(2)       } # update request = noop
(2)       if (("%{hex:&Class}" =~ /^%{hex:&Tmp-String-9}/) &&       ("%{string:&Class}" =~ /^ai:([0-9a-f]{32})/i)) {
(2)       EXPAND %{hex:&Class}
(2)          -->
(2)       EXPAND ^%{hex:&Tmp-String-9}
(2)          --> ^61693a
(2)       if (("%{hex:&Class}" =~ /^%{hex:&Tmp-String-9}/) &&       ("%{string:&Class}" =~ /^ai:([0-9a-f]{32})/i))  -> FALSE
(2)       else {
(2)         update request {
(2)           EXPAND %{md5:%{User-Name},%{Acct-Session-ID},%{%{NAS-IPv6-Address}:-%{NAS-IP-Address}},%{NAS-Identifier},%{NAS-Port-ID},%{NAS-Port}}
(2)              --> 8022139d00768a562a41866693fa1427
(2)           &Acct-Unique-Session-Id := 8022139d00768a562a41866693fa1427
(2)         } # update request = noop
(2)       } # else = noop
(2)     } # policy acct_unique = noop
(2)     if ( &Cisco-AVPair[*]=~/\(acct-input-octets-ipv6\)=\(\d+)/ ) {
(2)     if ( &Cisco-AVPair[*]=~/\(acct-input-octets-ipv6\)=\(\d+)/ )  -> FALSE
(2)     if ( &Cisco-AVPair[*]=~/\(acct-output-octets-ipv6\)=\(\d+)/ ) {
(2)     if ( &Cisco-AVPair[*]=~/\(acct-output-octets-ipv6\)=\(\d+)/ )  -> FALSE
(2)   } # preacct = ok


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