Dear All, I need a solution on IRULE for example to solve the following scenario: I have 10 servers that will receive XML requests. the unique ID in each XML request will be a number such as: 965123239490 now I want to direct the traffic depends on the last digit on that number. So, the traffic in "if else" style will be as follow: { if request ends with digit 0 in the number --> send it to server 1 in case server 1 down --> send it to server 2 } if request ends with digit 1 in the number --> send it to server 2 in case server 2 down --> send it to server 3 } if request ends with digit 2 in the number --> send it to server 3 in case server 3 down --> send it to server 4 } etc..... appreciate your support on how to get this down using F5 LB. Thanks in advance. Mohamed.

If you can send an example of the XML request that'd help in building an actual iRule. Otherwise, when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $digit { "*0" { if { [LB::status node 10.10.10.1] eq "up" } { node 10.10.10.1 80 } else { node 10.10.10.2 80 } } "*1" { if { [LB::status node 10.10.10.2] eq "up" } { node 10.10.10.2 80 } else { node 10.10.10.3 80 } } "*2" { if { [LB::status node 10.10.10.3] eq "up" } { node 10.10.10.3 80 } else { node 10.10.10.4 80 } } default { send to a default pool or node } } } Of course this doesn't deal with any type of persistence and what happens if the failover node is also down.

Okay, well there's an XML xpath way to do this with the XML_CONTENT_BASED_ROUTING event and an XML profile, but for such a small set of data that's probably more complicated than a single string parse. when HTTP_REQUEST { if { [HTTP::header Content-Type] contains "xml" } { HTTP::collect [HTTP::header Content-Length] } } when HTTP_REQUEST_DATA { set number [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "number = $number" now that you have the number you can add the switch code to find the last digit }I'm making an assumption of course that the XML request has a Content-Type header with the word "xml" in it, and I'm also not accounting for what might happen if the request isn't xml, but I hope this gets you going in the right direction.

Almost. You're assigning your XML value to the number variable, so the switch statement should reflect that: switch -glob $number

Hi Kevin, i tried to apply the following IRULE: when HTTP_REQUEST { if { [HTTP::header Content-Type] contains "xml" } { HTTP::collect [HTTP::header Content-Length] } when HTTP_REQUEST_DATA { set msisdn [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "msisdn = $msisdn" } when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $msisdn { "*0" { if { [LB::status node 10.10.10.1] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } "*1" { if { [LB::status node 10.10.10.2] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } default { send to a default pool or node } } } } but i got an error: 01070151:3: Rule [UCIP_MSISDN] error: line 6: [command is not valid in the current scope] [when HTTP_REQUEST { set msisdn [string trim [findstr [HTTP::payload] "" 8 ""]] enable for testing log local0. "msisdn = $msisdn" }] line 12: [command is not valid in the current scope] [when HTTP_REQUEST { some function to parse out the digits from the xml request switch -glob $msisdn { "0" { if { [LB::status node 10.10.10.1] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } "1" { if { [LB::status node 10.10.10.2] eq "up" } { node 172.24.248.85 8580 } else { node 172.24.248.85 8680 } } default { send to a default pool or node } } }] appreciate your feedback.

Hi, appreciate your help please

direct traffic based on information from the XML request

27 Replies

Al-Mutlaq_21911
Nimbostratus
Dec 20, 2015
Thanks a lot, it's working perfectly except the default not yet working..

i have put the the default as per below: default { pool $default_pool member 172.24.248.85 8080 }

we are almost there :) appreciate your support.
Al-Mutlaq_21911
Nimbostratus
Dec 21, 2015
any idea?

BR,

Stanislas_Piro2

Cumulonimbus

Dec 21, 2015

In the irule, if the MSISDN is not in query string and content type is not XML, the member is not defined in the irule... the request is load balanced on on of pool members...

I added a else condition in the HTTP_REQUEST event.

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

HTTP_REQUEST {
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
    if {[string length $msisdn] } {
        switch -glob $msisdn {
            "*0" {
                if { [LB::status pool $default_pool member 172.24.248.85 8580] eq "up" } {
                    pool $default_pool member 172.24.248.85  8580
                } else {
                    pool $default_pool member 172.24.248.85  8680
                }
            }
            "*1" {
                if { [LB::status pool $default_pool member 172.24.248.85 8680] eq "up" } {
                    pool $default_pool member 172.24.248.85  8580
                } else {
                    pool $default_pool member 172.24.248.85  8680
                }
            }
            default { pool $default_pool member 172.24.248.85 8080 }
        }  
    } elseif { [HTTP::header Content-Type] contains "xml" } {
        HTTP::collect [HTTP::header Content-Length]        
    } else { pool $default_pool member 172.24.248.85 8080 }
}

when HTTP_REQUEST_DATA {
    set msisdn [string trim [findstr [HTTP::payload] "" 8 ""]]

    switch -glob $msisdn {
        "*0" {
            if { [LB::status pool $default_pool member 172.24.248.85 8580] eq "up" } {
                pool $default_pool member 172.24.248.85  8580
            } else {
                pool $default_pool member 172.24.248.85  8680
            }
        }
        "*1" {
            if { [LB::status pool $default_pool member 172.24.248.85 8680] eq "up" } {
                pool $default_pool member 172.24.248.85  8580
            } else {
                pool $default_pool member 172.24.248.85  8680
            }
        }
        default { pool $default_pool member 172.24.248.85 8080 }
    }  
}

Al-Mutlaq_21911
Nimbostratus
Dec 21, 2015
Hi Currently am interested only on HTTP request, but still it's not going to default in case both members down
- Al-Mutlaq_21911
  Nimbostratus
  Dec 21, 2015
  when CLIENT_ACCEPTED { set default_pool [LB::server pool] } when HTTP_REQUEST { set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]] if {[string length $msisdn] } { switch -glob $msisdn { "*0" { if { [LB::status pool $default_pool member 172.24.248.85 8080] eq "up" } { pool $default_pool member 172.24.248.85 8080 } else { pool $default_pool member 172.24.248.85 8180 } } "*1" { if { [LB::status pool $default_pool member 172.24.248.85 8180] eq "up" } { pool $default_pool member 172.24.248.85 8180 } else { pool $default_pool member 172.24.248.85 8080 } } "*2" { if { [LB::status pool $default_pool member 172.24.248.85 8280] eq "up" } { pool $default_pool member 172.24.248.85 8280 } else { pool $default_pool member 172.24.248.85 8380 } } "*3" { if { [LB::status pool $default_pool member 172.24.248.85 8380] eq "up" } { pool $default_pool member 172.24.248.85 8380 } else { pool $default_pool member 172.24.248.85 8280 } } "*4" { if { [LB::status pool $default_pool member 172.24.248.85 8480] eq "up" } { pool $default_pool member 172.24.248.85 8480 } else { pool $default_pool member 172.24.248.85 8580 } } "*5" { if { [LB::status pool $default_pool member 172.24.248.85 8580] eq "up" } { pool $default_pool member 172.24.248.85 8580 } else { pool $default_pool member 172.24.248.85 8480 } } "*6" { if { [LB::status pool $default_pool member 172.24.248.85 8680] eq "up" } { pool $default_pool member 172.24.248.85 8680 } else { pool $default_pool member 172.24.248.85 8780 } } "*7" { if { [LB::status pool $default_pool member 172.24.248.85 8780] eq "up" } { pool $default_pool member 172.24.248.85 8780 } else { pool $default_pool member 172.24.248.85 8680 } } "*8" { if { [LB::status pool $default_pool member 172.24.248.85 8880] eq "up" } { pool $default_pool member 172.24.248.85 8880 } else { pool $default_pool member 172.24.248.85 8980 } } "*9" { if { [LB::status pool $default_pool member 172.24.248.85 8980] eq "up" } { pool $default_pool member 172.24.248.85 8980 } else { pool $default_pool member 172.24.248.85 8880 } } default { pool $default_pool member 172.24.248.85 8080 } } } }

Stanislas_Piro2

Cumulonimbus

Dec 21, 2015

try something like that:

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
    if {[string length $msisdn] } {
        switch -glob $msisdn {
            "*0" { set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
            "*1" { set ports {8180 8080 8380 8280 8580 8480 8780 8680 8980 8880}}
            "*2" { set ports {8280 8380 8480 8580 8680 8780 8880 8980 8080 8180}}
            "*3" { set ports {8380 8280 8580 8480 8780 8680 8980 8880 8180 8080}}
            "*4" { set ports {8480 8580 8680 8780 8880 8980 8080 8180 8280 8380}}
            "*5" { set ports {8580 8480 8780 8680 8980 8880 8180 8080 8380 8280}}
            "*6" { set ports {8680 8780 8880 8980 8080 8180 8280 8380 8480 8580}}
            "*7" { set ports {8780 8680 8980 8880 8180 8080 8380 8280 8580 8480}}
            "*8" { set ports {8880 8980 8080 8180 8280 8380 8480 8580 8680 8780}}
            "*9" { set ports {8980 8880 8080 8180 8280 8380 8480 8580 8680 8780}}
            default { set ports {8080 8180 8080 8180 8480 8580 8680 8780 8880 8980}}
        }  
    } else {set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
    foreach port $ports {
        if { [LB::status pool $default_pool member 172.24.248.85 $port] eq "up" } {
            pool $default_pool member 172.24.248.85  $port
            break
        }
    }
}

Al-Mutlaq_21911
Nimbostratus
Dec 21, 2015
Hi,

all traffics rejects with this IRULE!!
- Stanislas_Piro2
  Cumulonimbus
  Dec 21, 2015
  Do you have any tcl error in local traffic logs?
- Al-Mutlaq_21911
  Nimbostratus
  Dec 21, 2015
  Mon Dec 21 06:34:05 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status down. Mon Dec 21 06:34:05 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status down. Mon Dec 21 06:34:06 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status down. Mon Dec 21 06:34:06 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status down. Mon Dec 21 06:34:08 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status down. Mon Dec 21 06:34:08 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status down. Mon Dec 21 06:45:41 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status up. Mon Dec 21 06:45:41 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status up. Mon Dec 21 06:45:41 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8180 monitor status up. Mon Dec 21 06:45:41 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8180 monitor status up. Mon Dec 21 06:45:42 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status up. Mon Dec 21 06:45:42 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status up. Mon Dec 21 06:48:48 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070151 Rule [MSISDN] error: line 80: [undefined procedure: default] [default { pool $default_pool member 172.24.248.85 8080 }] Mon Dec 21 07:02:26 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status up. Mon Dec 21 07:02:26 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status up. Mon Dec 21 07:02:27 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8580 monitor status up. Mon Dec 21 07:02:27 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8580 monitor status up. Mon Dec 21 07:27:46 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status down. Mon Dec 21 07:27:46 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8280 monitor status down. Mon Dec 21 07:27:47 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status down. Mon Dec 21 07:27:47 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8680 monitor status down. Mon Dec 21 07:27:47 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8180 monitor status down. Mon Dec 21 07:27:47 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8180 monitor status down. Mon Dec 21 07:27:48 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8580 monitor status down. Mon Dec 21 07:27:48 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8580 monitor status down. Mon Dec 21 07:27:48 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status down. Mon Dec 21 07:27:48 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status down. Mon Dec 21 07:32:53 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status up. Mon Dec 21 07:32:53 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070638 Pool member 172.24.248.85:8080 monitor status up. Mon Dec 21 07:51:37 AST 2015 sdprm1tp1lb01 mcpd[1029] 01070151 Rule [MSISDN] error: line 81: [undefined procedure: else] [else] Mon Dec 21 09:53:21 AST 2015 tmm tmm[954] 01220001 TCL error: Rule MSISDN HTTP_REQUEST - cant read ports: no such variable while executing set $ports {8880 8980 8080 8180 8280 8380 8480 8580 8680 8780} *8 arm line 1 invoked from within switch -glob $msisdn { *0 { set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}} *1 { set $ports {8180 8080 838... Mon Dec 21 09:53:22 AST 2015 tmm tmm[954] 01220001 TCL error: Rule MSISDN HTTP_REQUEST - cant read ports: no such variable while executing set $ports {8880 8980 8080 8180 8280 8380 8480 8580 8680 8780} *8 arm line 1 invoked from within switch -glob $msisdn { *0 { set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}} *1 { set $ports {8180 8080 838... Mon Dec 21 09:53:27 AST 2015 tmm tmm[954] 01220001 TCL error: Rule MSISDN HTTP_REQUEST - cant read ports: no such variable while executing set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980} *0 arm line 1 invoked from within switch -glob $msisdn { *0 { set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}} *1 { set $ports {8180 8080 838... Mon Dec 21 09:53:29 AST 2015 tmm tmm[954] 01220001 TCL error: Rule MSISDN HTTP_REQUEST - cant read ports: no such variable while executing set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980} *0 arm line 1 invoked from within switch -glob $msisdn { *0 { set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}} *1 { set $ports {8180 8080 838... Mon Dec 21 09:55:08 AST 2015 tmm tmm[954] 01220001 TCL error: Rule MSISDN HTTP_REQUEST - cant read ports: no such variable while executing set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980} *0 arm line 1 invoked from within switch -glob $msisdn { *0 { set $ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}} *1 { set $ports {8180 8080 838...
- Stanislas_Piro2
  Cumulonimbus
  Dec 21, 2015
  I corrected the irule... there was a $ in the set command...

Stanislas_Piro2

Cumulonimbus

Dec 21, 2015

I don't understand what is wrong on the updated irule...

I tested it successfully...

Can you try this irule and update with the last /var/log/ltm lines...

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
    if {[string length $msisdn] } {
        switch -glob $msisdn {
            "*0" { set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
            "*1" { set ports {8180 8080 8380 8280 8580 8480 8780 8680 8980 8880}}
            "*2" { set ports {8280 8380 8480 8580 8680 8780 8880 8980 8080 8180}}
            "*3" { set ports {8380 8280 8580 8480 8780 8680 8980 8880 8180 8080}}
            "*4" { set ports {8480 8580 8680 8780 8880 8980 8080 8180 8280 8380}}
            "*5" { set ports {8580 8480 8780 8680 8980 8880 8180 8080 8380 8280}}
            "*6" { set ports {8680 8780 8880 8980 8080 8180 8280 8380 8480 8580}}
            "*7" { set ports {8780 8680 8980 8880 8180 8080 8380 8280 8580 8480}}
            "*8" { set ports {8880 8980 8080 8180 8280 8380 8480 8580 8680 8780}}
            "*9" { set ports {8980 8880 8080 8180 8280 8380 8480 8580 8680 8780}}
            default { set ports {8080 8180 8080 8180 8480 8580 8680 8780 8880 8980}}
        }  
    } else {set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
    foreach port $ports {
        if { [LB::status pool $default_pool member 172.24.248.85 $port] eq "up" } {
            pool $default_pool member 172.24.248.85 $port
            log local0. "id: $msisdn\tselected port: $port"
            break
        }
    }
}

The expected behavior of this irule is to assign pool member port based on the ports list assigned per msisdn parameter.

Stanislas_Piro2

Cumulonimbus

Dec 24, 2015

Ok,

the issue is because you stripped one part of the irule. if the irule use only query parameter, you can remove the

if {[string length $msisdn] } {

... I answered this issue previously before you remove the XML part by adding a else statement

} else { pool $default_pool member 172.24.248.85 8080 }

The irule become:

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
        switch -glob $msisdn {
            "*0" {
                if { [LB::status pool $default_pool member 172.24.248.85 8080] eq "up" } {
                    pool $default_pool member 172.24.248.85  8080
                } else {
                    pool $default_pool member 172.24.248.85  8180
                }
            }
            "*1" {
                if { [LB::status pool $default_pool member 172.24.248.85 8180] eq "up" } {
                    pool $default_pool member 172.24.248.85  8180
                } else {
                    pool $default_pool member 172.24.248.85  8080
                }
            }   
            "*2" {
                if { [LB::status pool $default_pool member 172.24.248.85 8280] eq "up" } {
                    pool $default_pool member 172.24.248.85  8280
                } else {
                    pool $default_pool member 172.24.248.85  8380
                }
            }
            "*3" {
                if { [LB::status pool $default_pool member 172.24.248.85 8380] eq "up" } {
                    pool $default_pool member 172.24.248.85  8380
                } else {
                    pool $default_pool member 172.24.248.85  8280
                }
            } 
            "*4" {
                if { [LB::status pool $default_pool member 172.24.248.85 8480] eq "up" } {
                    pool $default_pool member 172.24.248.85  8480
                } else {
                    pool $default_pool member 172.24.248.85  8580
                }
            } 
            "*5" {
                if { [LB::status pool $default_pool member 172.24.248.85 8580] eq "up" } {
                    pool $default_pool member 172.24.248.85  8580
                } else {
                    pool $default_pool member 172.24.248.85  8480
                }
            }
            "*6" {
                if { [LB::status pool $default_pool member 172.24.248.85 8680] eq "up" } {
                    pool $default_pool member 172.24.248.85  8680
                } else {
                    pool $default_pool member 172.24.248.85  8780
                }
            }
            "*7" {
                if { [LB::status pool $default_pool member 172.24.248.85 8780] eq "up" } {
                    pool $default_pool member 172.24.248.85  8780
                } else {
                    pool $default_pool member 172.24.248.85  8680
                }
            }
            "*8" {
                if { [LB::status pool $default_pool member 172.24.248.85 8880] eq "up" } {
                    pool $default_pool member 172.24.248.85  8880
                } else {
                    pool $default_pool member 172.24.248.85  8980
                }
            }
            "*9" {
                if { [LB::status pool $default_pool member 172.24.248.85 8980] eq "up" } {
                    pool $default_pool member 172.24.248.85  8980
                } else {
                    pool $default_pool member 172.24.248.85  8880
                }
            }
            default { pool $default_pool member 172.24.248.85 8080 }
        }  
}

But you can look at my previous irule assigning a list of pool members and not only 2...

Al-Mutlaq_21911
Nimbostratus
Dec 24, 2015
no actually, the expected is: send to port 8080 if it is up, else, it send to port 8180, else pool member 8080 regardless it's up or down.

another example: send to port 8980 if it is up, else, it send to port 8880, else 8080

so 8080 will be always my default

Stanislas_Piro2

Cumulonimbus

Dec 24, 2015

You can try this:

The pool member 8080 is assigned at the beginning... if msisdn is present and pool members are up, the pool member is changed.

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    pool $default_pool member 172.24.248.85 8080
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
    switch -glob $msisdn {
        "*0" { set ports {8080 8180}}
        "*1" { set ports {8180 8080}}
        "*2" { set ports {8280 8380}}
        "*3" { set ports {8380 8280}}
        "*4" { set ports {8480 8580}}
        "*5" { set ports {8580 8480}}
        "*6" { set ports {8680 8780}}
        "*7" { set ports {8780 8680}}
        "*8" { set ports {8880 8980}}
        "*9" { set ports {8980 8880}}
        default { set ports {8080 8180}}
    }
    foreach port $ports {
        if { [LB::status pool $default_pool member 172.24.248.85 $port] eq "up" } {
            pool $default_pool member 172.24.248.85  $port
            break
        }
    }
}

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direct traffic based on information from the XML request

27 Replies

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