Provided by: shorewall_4.4.26.1-1_all bug


       tcdevices - Shorewall Traffic Shaping Devices file




       Entries in this file define the bandwidth for interfaces on which you
       want traffic shaping to be enabled.

       If you do not plan to use traffic shaping for a device, don't put it in
       here as it limits the throughput of that device to the limits you set

       A note on the bandwidth definitions used in this file:

       o   don't use a space between the integer value and the unit: 30kbit is
           valid while 30 kbit is not.

       o   you can use one of the following units:

               Kilobytes per second.

               Megabytes per second.

               Kilobits per second.

               Megabits per second.

           bps or number
               Bytes per second.

       o   Only whole integers are allowed.

       The columns in the file are as follows (where the column name is
       followed by a different name in parentheses, the different name is used
       in the alternate specification syntax).

       INTERFACE - [number:]interface
           Name of interface. Each interface may be listed only once in this
           file. You may NOT specify the name of an alias (e.g., eth0:0) here;

           You may NOT specify wildcards here, e.g. if you have multiple ppp
           interfaces, you need to put them all in here!

           If the device doesn't exist, a warning message will be issued
           during "shorewall [re]start" and "shorewall refresh" and traffic
           shaping configuration will be skipped for that device.

           Shorewall assigns a sequential interface number to each interface
           (the first entry in the file is interface 1, the second is
           interface 2 and so on) You can explicitly specify the interface
           number by prefixing the interface name with the number and a colon
           (":"). Example: 1:eth0.

       IN-BANDWIDTH (in_bandwidth) -
           The incoming bandwidth of that interface. Please note that you are
           not able to do traffic shaping on incoming traffic, as the traffic
           is already received before you could do so. But this allows you to
           define the maximum traffic allowed for this interface in total, if
           the rate is exceeded, the packets are dropped. You want this mainly
           if you have a DSL or Cable connection to avoid queuing at your
           providers side.

           If you don't want any traffic to be dropped, set this to a value to
           zero in which case Shorewall will not create an ingress qdisc.Must
           be set to zero if the REDIRECTED INTERFACES column is non-empty.

           The optional burst option was added in Shorewall 4.4.18. The
           default burst is 10kb. A larger burst can help make the bandwidth
           more accurate; often for fast lines, the enforced rate is well
           below the specified bandwidth.

           What is described above creates a rate/burst policing filter.
           Beginning with Shorewall 4.4.25, a rate-estimated policing filter
           may be configured instead. Rate-estimated filters should be used
           with ethernet adapters that have Generic Receive Offload enabled by
           default. See Shorewall FAQ 97a[1].

           To create a rate-estimated filter, precede the bandwidth with a
           tilde ("~"). The optional interval and decay_interval determine how
           often the rate is estimated and how many samples are retained for
           estimating. Please see
           for details.

       OUT-BANDWIDTH (out_bandwidth) - bandwidth
           The outgoing bandwidth of that interface. This is the maximum speed
           your connection can handle. It is also the speed you can refer as
           "full" if you define the tc classes in shorewall-tcclasses[2](5).
           Outgoing traffic above this rate will be dropped.

       OPTIONS - {-|{classify|hfsc} ,...}
           classify -- When specified, Shorewall will not generate tc or
           Netfilter rules to classify traffic based on packet marks. You must
           do all classification using CLASSIFY rules in

           hfsc - Shorewall normally uses the Hierarchical Token Bucket
           queuing discipline. When hfsc is specified, the Hierarchical Fair
           Service Curves discipline is used instead.

       REDIRECTED INTERFACES (redirect)- [interface[,interface]...]
           May only be specified if the interface in the INTERFACE column is
           an Intermediate Frame Block (IFB) device. Causes packets that enter
           each listed interface to be passed through the egress filters
           defined for this device, thus providing a form of incoming traffic
           shaping. When this column is non-empty, the classify option is


       Example 1:
           Suppose you are using PPP over Ethernet (DSL) and ppp0 is the
           interface for this. The device has an outgoing bandwidth of 500kbit
           and an incoming bandwidth of 6000kbit

                       #INTERFACE   IN-BANDWIDTH    OUT-BANDWIDTH         OPTIONS         REDIRECTED
                       #                                                                  INTERFACES
                       1:ppp0         6000kbit        500kbit




       shorewall(8), shorewall-accounting(5), shorewall-actions(5),
       shorewall-blacklist(5), shorewall-hosts(5), shorewall_interfaces(5),
       shorewall-ipsets(5), shorewall-maclist(5), shorewall-masq(5),
       shorewall-nat(5), shorewall-netmap(5), shorewall-params(5),
       shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5),
       shorewall-route_rules(5), shorewall-routestopped(5),
       shorewall-rules(5), shorewall.conf(5), shorewall-secmarks(5),
       shorewall-tcclasses(5), shorewall-tcrules(5), shorewall-tos(5),
       shorewall-tunnels(5), shorewall-zones(5)


        1. Shorewall FAQ 97a

        2. shorewall-tcclasses

        3. shorewall-tcrules

[FIXME: source]                   12/13/2011            SHOREWALL-TCDEVICES(5)