Cisco Videoscape Distribution Suite Transparent
Caching CDR Guide
Release 5.6.1
August 2015
CDR Structure
Cisco VDS TC generates Cache Detail Records (CDRs) that detail the content that is handled by the
system. These records include information on cache in, cache out, and forwarded content. In addition
to this information, each HTTP related CDR includes information for its detected service group.
The following is a sample CDR record. A description of the parameters in this file are provided in the
CDR Parameters section. For more examples, see the CDR Examples section.
19-02-14
13:00:01.829,HTTP,3688F0157F820E4DD3533AE9818773E7DA372C04, 10.201.13.16 , /?Transact
ion-Profile=CO_30MB ,SESSION_ENDED,29997220,13,10.103.40.126,50527,10.201.13.16,80,0,0,
CACHE_OUT,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,CDR_EOL

Note


The ASCII bell character, (hexadecimal value of x'07') differentiates a double quote, beginning or
ending a string.
Filename
The CDR filename follows a predefined naming convention, that indicates the CDR version. Table 1-1
describes the parts of the filename using the filename pang_cdr.log.v43.ce-2.032315_234941.gz as an
example.
Cisco Systems, Inc.
www.cisco.com
Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the
Cisco website at www.cisco.com/go/offices.
Table 1-1
Filename Description
Indicator
Description
pang_cdr.log
This text indicates that this file is a CDR file.
v43
Identifies the CDR version. In this example,
version 4.3.
Note
This determines the internal structure of
the CDR file, which may vary between
versions.
ce-n
Cache engine from which the CDR file originated
(n indicates the cache engine number). In the
example, this is a file from cache engine 2.
032315_234941
Date and time, indicated by two digits (month,
date, year _ hour, minutes, seconds)
File Format
The format of the CDR file resembles that of the CSV:
•
All fields are ASCII characters.
•
Columns are separated by commas.
•
Nulls are represented by the character 0 (zero) placed between commas.
•
A bell character () is always printed within the CDR. This is hard coded and cannot be
configured to something else.
•
The line delimiter is new line (\n).
CDR Parameters
The parameters of the CDR file provide details about the traffic that is handled and delivered by the
VDS TC system. Table 1-2 defines the parameters in a CDR record, using the following IPv6 CDR
example. The ID # references are not part of the actual CDR record. They have been added to the
example to identify the different parameters of the record:
14-05-15
16:00:01.696(ID1),HTTP(ID2),crl.omniroot.com(ID4),/PublicSureServerSV.crl(ID5),
FIN(ID6),1448(ID7),0(ID8),41.188.8.175(ID9),52482(ID10),64.18.20.129(ID11),80(ID12),
286(ID13),15(ID14),FORWARD(ID15),0(ID16),286(ID17),0(ID18),0(ID19),0(ID20),0(ID21),
0(ID22),0(ID23),0(ID24),0(ID25),0(ID26),0(ID27),0(ID28),0(ID29),0(ID30),0(ID31),
0(ID32),0(ID33),0(ID34),0(ID35),0(ID36),0(ID37),0(ID38),0(ID39),0(ID40),0(ID41),
1(ID42),1448(ID43),51314(ID44),(ID45),51DF9719(ID46),49999976(ID47),43384832(ID48),
43(ID49),CDR_EOL (ID50)
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Table 1-2
CDR Fields
ID
Name
Type
Definition
Length
Nullable Comments
1
Date Time
Date
This indicates the actual
time frame
22
No
Format DD-MM-YY
HH24:MI:SS.MS.
2
Protocol
String
1-10
This is the format that is
used for transmitting data
from one device to another.
No
See the Protocol
Values table.
3
Hash
Hex string
The hash is used to generate 40
a unique fixed length data
output. This acts as a
shortened reference to the
original data.
Yes
E500FDF95C27ACE
5C86068A6BE603A
0-BA857CBBB
4
Host
String
This is a physical network Up to
node that runs both the
256
server and client programs.
The host field value from
the HTTP Request.
Yes
This only exists on
HTTP and Netflix
protocols. For
example:
xml.alexa.com
5
Request Uri
String
The HTTP Request - Uri
value from the HTTP start
line (web address).
6
Session
termination
reason
String
The “STR” details possible Variable
reasons for session
termination.
No
7
Transferred
bytes
Long
The transferred byte
amount.
No
8
Session
duration
Integer
The time measure of a
session
No
Seconds
9
Source IP
4 octets
separated
by a
dot(IPv4)
The source IP is the
subscriber IP address.
No
IPv4 or IPv6 source
IP addresses. For
example,110.100.13.
152 or
Up to 1K Yes
16
16 octets
separated
by a colon
(IPv6)
For example:
/smartart/Text
Effects/Texteffect
None.swf
See the Session
Termination Reason
table.
0001::2000:0000:000
0:0002:01ce
10
Source port
Integer
The source port is the
subscriber port.
11
Destination
IP
4 octets
separated
by a dot
(IPv4)
The destination IP is the
endpoint IP address of the
of the host.
No
16
No
IPv4 or IPv6
destination IP
addresses.
16 octets
separated
by a colon
(IPv6)
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Table 1-2
CDR Fields (Continued)
ID
Name
Type
Definition
Length
Nullable Comments
12
Destination
port
Integer
The destination port is the
endpoint of the host.
No
13
HTTP
Service
Category ID
Integer
This is the first category
index from the matched
HTTP service. This is
configured within the
Policy Manager.
No
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
14
HTTP
Service ID
Integer
This is the matched HTTP
Service index. This is
configured within the
Policy Manager.
No
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
15
CDR Type
String
A Cache/Content Data
Record field which
classifies by type. For more
information, see the CDR
Types table.
No
The field classifies
the CACHE_OUT,
VERIFY and
VERIDFY_AT.
16
Application
Category ID
Integer
The matched Application
Category index which is
configured within the
Policy Manager
(Application).
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
The Application field
provides a high level
summary of the content that
can be used for reporting
and policy creation, such as
file sharing and software
updates.
17
Service
Category ID
Integer
The matched Service
Category Index which is
configured within the
Policy Manager.
Yes
The Service Category
ID is a legacy
configuration based
on the policy
manager
configuration.
18
Internet Side
Network
Category ID
Integer
The matched Internet Side
Network Category Index
which is configured within
the Policy Manager.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
This is associated to a
sub-network address.
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Table 1-2
CDR Fields (Continued)
ID
Name
Type
Definition
19
Subscriber
Network
Category ID
Integer
The matched Subscriber
Network Category Index
which is configured within
the Policy Manager.
Length
Nullable Comments
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
The Subscriber Network is
a category used to define
the destination IP or subnet
of the content.
20
Device
Category ID
Integer
The matched Device
Category Index which is
configured within the
Policy Manager.
The User Agent is an HTTP
header that specifies the
type of browser/ device.
21
HTTP
Referrer
Category ID
(not used,
always 0)
Integer
The matched HTTP
Referrer Category Index
which is configured within
the Policy Manager.
Yes
This field is not used.
The default value of
this field is 0.
22
Content Type Integer
(MIME)
Category ID
The matched Content Type
(MIME) Category Index
which is configured within
the Policy Manager.
Yes
This field is not used.
The default value of
this field is 0.
23
SmartFilter
Category ID
The matched SmartFilter
Category Index which is
configured within the
Policy Manager. This is
used as a screen to
filter/block specific content
to the users.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
24
Video Stream Integer
Bit Rate
This contains the video
stream bit.
Yes
25
Video Stream Integer
Resolution
This contains the video
stream resolution.
Yes
For YouTube traffic,
the rate value is the
itag URL parameter
value that indicates
the video resolution.
26
Bandwidth
Policy ID
This is a bandwidth policy
index. It populates when a
Rule with a bandwidth
policy is matched.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
Integer
Integer
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Table 1-2
CDR Fields (Continued)
ID
Name
Type
Definition
27
Admission
Policy ID
Integer
This is an Admission policy
index.
Length
Nullable Comments
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
It populates when a Rule
with an Admission policy is
matched.
This is associated with
blocking or re-directing
sites.
28
Cache
Control
Policy ID
Integer
This is a Cache Control
policy index. It populates
when a Rule with a Cache
Control policy is matched.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
This policy
disables/enables the media
cache traffic to be cached in
Cisco VDS TC Manager.
29
Webcache
Control
Policy ID
Integer
This is a web cache control
policy index. It populates
when a rule with a web
cache control policy is
matched. This policy
disables the web cache
traffic to be cached in Cisco
VDS TC Manager.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
30
DSCP Policy Integer
ID
This is a DSCP policy
index. It populates when a
Rule with a DSCP policy is
matched.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
This policy classifies cache
out traffic in DSCP field
that exists in the IPv4/IP6
headers.
31
Bandwidth
Policy Rule
ID
Integer
This is the matched rule
index that applies the
bandwidth policy on the
current session.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
32
Admission
Policy Rule
ID
Integer
This is the matched rule
index that applies the
admission policy on the
current session.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
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Table 1-2
CDR Fields (Continued)
ID
Name
Type
Definition
Length
Nullable Comments
33
Cache
Control
Policy Rule
ID
Integer
This is the matched rule
index which applies the
cache control (media cache
control) policy on the
current session.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
34
Web-Cache
Control
Policy Rule
ID
Integer
This is the matched rule
index which applies the
webcache control policy on
the current session.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
35
DSCP Policy Integer
Rule ID
This is the matched rule
index which applies the
DSCP policy on the current
session.
Yes
The values can be
seen in VDS TC
Manager. This field is
used by VDS TC
Analytics for Traffic
Analysis.
36
Cache-In (Number of
Requests)
Integer
This field is used to specify
the number of requests
cached from in the traffic.
Yes
This is used in
Web-Cache Sessions
Only.
37
Cache-In
(Number of
Bytes)
Integer
This field is used to specify
the number of bytes cached
from in the traffic.
Yes
This is used in
Web-Cache Sessions
Only.
38
Cache-In
(Duration)
Integer
This field is used to
measure the amount of
expired time of the
incoming cache from the
traffic.
Yes
This is used in
Web-Cache Sessions
Only.
39
Cache-Out
(Number of
Requests)
Integer
This field is used to specify
the number of cached -out
requests from the traffic.
Yes
This is used in
Web-Cache Sessions
Only.
40
Cache-Out
(Number of
Bytes)
Integer
This field is used to specify
the number of cached -out
bytes from the traffic.
Yes
This is used in
Web-Cache Sessions
Only.
41
Cache-Out
(Duration)
Integer
This field is used to
measure the amount of
expired time of the cache
-out from the traffic.
Yes
This is used in
Web-Cache Sessions
Only.
42
Forward
(Number of
Requests)
Integer
The process of forwarding
requests directly to the
requesting subscriber
without caching it.
Yes
This is used in
Web-Cache Sessions
Only.
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Table 1-2
CDR Fields (Continued)
ID
Name
Type
Definition
43
Forward
(Number of
Bytes)
Integer
The process of forwarding
the number of bytes
directly to the requesting
subscriber without caching
it.
Yes
This is used in
Web-Cache Sessions
Only.
44
Forward
(Duration)
Integer
The time expended during
the forwarding process.
Yes
This is used in
Web-Cache Sessions
Only.
45
Referrer
String
This is an HTTP header
field that identifies the
address of the web page
linked to the resource being
requested.
Yes
This is used in
Web-Cache Sessions
Only.
46
HTTP Agent
Hash
Hex string
The HTTP agent hash is
used to generate the fixed
length output data of the
HTTP agent that acts as a
shortened reference to the
original data.
47
Full File Size Integer
Displays available user
requested file size in bytes.
48
Cached File
Size
Displays the amount of
bytes cached from the
requested user file.
49
Connection_i Integer
gnore_reason
Displays the reason a
connection state changed
50
CDR EOL
This is the end of the line
for the CDR.
Integer
String
Length
Nullable Comments
See HTTP Agent
Hash section for
more information.
Yes
HTTP Agent Hash
There are db files in Cisco VDS TC Release 5.6.1 that contain hash value-to-user agent mappings, such
as C75E3DDB, Mozilla/5.0. To determine the user agent that generated the traffic for a CDR entry, you
can look up the hash value in field # 46 of the CDR in this db file.
Each VDS TC cache engine generates its own hash db file, named http_agents.ce-#.db, where # is the
cache engine number. The hash db files for all of the cache engines are automatically copied to the VDS
TC management server. Therefore, it is easiest to view these files from the VDS TC management server.
Note
The size of these db files is limited to a maximum of 10,000 entries. The db files overwrite the least
used agents with new entries once a day.
To see a list of available hash db files, from the VDS TC management server enter the command
/opt/pang/cdrs> ls *db*. After you have the name of a hash db file, to view its contents enter the
command more filename. For example:
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padmin@mg-1:/opt/pang/cdrs> more http_agents.ce-1.db
C75E3DDB, Mozilla/5.0
2898930B, Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.3) Gecko/2008
092417 Firefox/3.0.3
CDA23AB3, Prey/0.5.3 (windows)
C5776619, Prey/0.6.0 (windows)
6D4E94E8, Prey/0.6.2 (windows)
AB98F1B7, libhttp/1.61 (PlayStation 4)
8C5F7958, libhttp/3.01 (PS Vita)
90CDC52F,$%7BPRODUCT_NAME%7D/1 CFNetwork/548.0.4 Darwin/11.0.0
A8EC6A20,$%7BPRODUCT_NAME%7D/1 CFNetwork/548.1.4 Darwin/11.0.0
37316021,%7BPRODUCT_NAME%7D/1.6.8 CFNetwork/609.1.4 Darwin/13.0.0
F6FFF20B,%7BPRODUCT_NAME%7D/1.6.8 CFNetwork/672.0.8 Darwin/14.0.0
695DB3F6,%D0%92%D0%95%D0%A1%D0%A2%D0%98/3.0.38 CFNetwork/672.0.8 Darwin/14.0.0
F3901CA6,%D0%92%D0%9A%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5%202/2053 CFNetwo
rk/672.0.8 Darwin/14.0.0
516CBC3E,%D0%92%D0%9A%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5/2124 CFNetwork/6
72.0.8 Darwin/14.0.0
93B32F2E,%D0%9F%D0%BE%D0%B3%D0%BE%D0%B4%D0%B0/1.0 CFNetwork/672.0.2 Darwin/14.0.0
Protocols
Table 1-3 lists the CDR protocols that might be referenced in the Protocol field of the CDR.
Table 1-3
Protocol Values
SNMP ID
Field Value
Description
1
EDK
eDonkey
2
BT
BitTorrent
3
GNUTL
Gnutella (not supported)
4
ARES
Ares
5
HTTP
HTTP
6
SILVERLIGHT
Silverlight
7
NETFLIX
Netflix
Session Termination Reason
Talbe 1-4 lists the possible reasons that might be displayed in a CDR for session termination.
Table 1-4
Session Termination Reason
ID
Field Value
Description
1
SESSION_ENDED
Session ended after the entire file is delivered to
the downloader.
2
CMDBMISS
The request range (in P2P) or file (HTTP) is not in
the cache.
3
DOWNLOADER
The downloader closed the session.
4
TIMEOUT
The session timed out.
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Table 1-4
Session Termination Reason
ID
Field Value
Description
5
ERROR
An error occurred serving the session.
6
RST
One of the sides reset the connection.
7
FIN
The connection terminated normally.
8
UPLOADER
The uploader closed the session.
9
UNKNOWN
None of the above reasons.
10
FORMAT_CHANGED
A change of the speed rate for Silverlight traffic.
CDR Types
Table 1-5 lists the different CDR types that may appear in the CDR Type field of the CDR.
Table 1-5
CDR Types
ID
Field Value
Description
1
CACHE_OUT
Associated with cache out.
2
CACHE_IN
A cache in transaction.
3
FORWARD
A forward transaction.
4
VERIFY
File verification process occurs upon first time file access.
5
VERIFY_AT
This is a verification session that was not completed due to
RST or TCP connection time-out from the client or server.
CDR Examples
CDR Type Examples
Note
For your reference, the CDR type is noted in bold.
CACHE_OUT
14-05-15
15:58:32.000,HTTP,9D8542B1D54BEC17435272B7F6507A76F06B8B2D,10.201.19.11,/?Transaction-Pro
file=CO_5MB,SESSION_ENDED,9997236,6,10.109.55.7,54090,10.201.19.11,80,0,0,CACHE_OUT,0,0,0
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,10000000,10000000,6,CDR_EOL
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CACHE_IN
13-04-15
20:52:59.593,HTTP,6EA3B731244E5EF05D971F074D056923F09DC915,tp.akam.nflximg.com,/tpa3/690/
424235690.bif,TIMEOUT,2508772,31,10.10.1.2,61128,63.80.4.66,80,0,0,CACHE_IN,0,0,0,0,335,0
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,2508772,2508772,6,CDR_EOL
FORWARD
14-05-15
15:58:33.015,HTTP,9E0E23311E296BE2CCC2C1A293EC7897D61F35F4,10.201.22.6,/?Transaction-Prof
ile=CI_30MB,FIN,30000106,16,10.112.171.5,12936,10.201.22.6,80,0,0,FORWARD,0,0,0,0,0,0,0,0
,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,29999990,9802343,43,CDR_EOL
VERIFY
26-07-15
10:05:21.417,HTTP,37264C5938EC3764E0DC079D55F19597D27ABD47,^G10.201.24.8^G,^G/?Transactio
n-Profile=CI_30MB^G,SESSION_ENDED,30999916,1,10.114.0.2,19595,10.201.24.8,80,0,0,VERIFY,0
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,00000000,30999916,,6,CDR_EOL
VERIFY_AT
13-04-15
21:40:01.586,HTTP,3582B7CF0BD06219A62BE289F10A56E997EF4A90,tp.akam.nflximg.com,/tpa3/886/
424236886.bif,TIMEOUT,1513000,31,10.10.1.2,61343,63.80.4.80,80,0,0,VERIFY_AT,0,0,0,0,335,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,1513000,,6,CDR_EOL
CDR Protocol Examples
Note
For your reference, the CDR protocol is noted in bold.
Note
BitTorrent traffic will have a CDR type of CACHE_OUT.
BitTorrent
09-03-14
09:00:49.678,BT,551C93A31984EF42EA495AA5BBD884840F7797E0,,,DOWNLOADER,12494514,19,83.223.
186.231,49758,89.109.103.108,46765,0,0,CACHE_OUT,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
,,,,,,,,,,51DF9719,,,43,CDR_EOL
Note
A termination code of TIMEOUT is normal for BitTorrent traffic. This is because the subscriber will
open many TCP sessions to peers to receive different “chunks” of the file. After the file is finished
downloading, some TCP connections may remain open until the TCP session times out because of no
activity.
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29-11-14
15:57:27.826,BT,32D1BE7B9A74745CB3086E44EFC2233F458C9F51,,,TIMEOUT,0,32,201.73.175.82,
14333,79.51.48.145,62982,0,0,CACHE_OUT,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,
00000000,,,,CDR_EOL
Note
A termination code of CMDBMISS is also normal for BitTorrent traffic. This is because the subscriber
will open many TCP sessions to peers to receive different “chunks” of the file and the requested port
range for the additional chunks are not in cache.
29-11-14
15:57:31.156,BT,32D1BE7B9A74745CB3086E44EFC2233F458C9F51,,,CMDBMISS,0,4,201.73.175.82,
54365,89.120.234.16,25332,0,0,CACHE_OUT,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,
,00000000,,,,CDR_EOL
HTTP
14-05-15
16:00:02.375,HTTP,A82BFC17BF7E6501BB08F0C8593114A15DCAFC80,10.201.15.26,/?Transaction-Pro
file=FWD_50MB,FIN,49999975,22,10.105.163.139,55304,10.201.15.26,80,0,0,FORWARD,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,,,,,,,,,,51DF9719,,,43,CDR_EOL
YouTube Videoplayback Example
09-03-14
12:29:48.368,HTTP,6A53245078C7C58D823FF3ADAF5D1D8700000000,r7---sn-nhpaxua8l.googlevideo.
com,/videoplayback?fexp=933508%2C937502%2C919319%2C914005%2C916611%2C901448%2C936912%2C93
6910%2C907231&id=0a819c53dad07035&burst=40&sver=3&ipbits=0&ip=77.127.74.78&gir=yes&signat
ure=801E94AAE7BD46CCB83263FA6916EBA75D91635E.6EF2DE834FAC0A520C0D9788C4643D1DE2D5400D&mt=
1384433429&mv=m&itag=135&ms=au&upn=22eThQPTKt0&sparams=algorithm%2Cburst%2Cclen%2Cdur%2Cf
actor%2Cgir%2Cid%2Cip%2Cipbits%2Citag%2Clmt%2Csource%2Cupn%2Cexpire&expire=1384454308&cle
n=1448385&algorithm=throttlefactor&factor=1.25&source=youtube&dur=15.108&lmt=138436144077
0122&key=yt5&ratebypass=yes,SESSION_ENDED,1187617,4,10.200.5.1,63451,212.199.205.210,80,5
4,7,CACHE_OUT,0,54,0,0,143,0,0,0,749,135,16,0,0,0,0,8,8,8,8,8,,,,,,,,,,,51DF9719,,,43,CDR
_EOL
Cisco Videoscape Distribution Suite Transparent Caching CDR Guide
12
OL-32828-02