allows you to change the Differentiated Services Code Point (DSCP) marking for
COPS messages that are transmitted or received by the Cisco router. Cisco IOS
Release 12.3(13a)BC supports this function with the
dscp command changes the default IP parameters for
connections between the Cisco router and COPS servers in the cable network.
DSCP values are
used in Quality of Service (QoS) configurations on a Cisco router to summarize
the relationship between DSCP and IP precedence. This command allows COPS to
remark the packets for either incoming or outbound connections.
setting is 0 for outbound connections. On default incoming connections, the
COPS engine takes the DSCP value from the COPS server initiating the TCP
affects all TCP connections with all COPS servers.
dscp command allows the Cisco router to re-mark
the COPS packets for either incoming or outbound connections.
- This command affects all
TCP connections with all COPS servers.
- This command does not
affect existing connections to COPS servers. Once you issue this command, this
function is supported only for new connections after that point in time.
- For messages transmitted
by the Cisco router, the default DSCP value is 0.
- For incoming connections
to the Cisco router, the COPS engine takes the DSCP value used by the COPS
server that initiates the TCP connection, by default.
information about this feature and related commands, refer to the “COPS Engine
Operation on the Cisco CMTS Routers” feature document on Cisco.com.
basic example illustrates the use of this command:
example illustrates the cops ip dscp command with supported command variations:
Router(config)# cops ip dscp ?
<0-63> DSCP value
af11 Use AF11 dscp (001010)
af12 Use AF12 dscp (001100)
af13 Use AF13 dscp (001110)
af21 Use AF21 dscp (010010)
af22 Use AF22 dscp (010100)
af23 Use AF23 dscp (010110)
af31 Use AF31 dscp (011010)
af32 Use AF32 dscp (011100)
af33 Use AF33 dscp (011110)
af41 Use AF41 dscp (100010)
af42 Use AF42 dscp (100100)
af43 Use AF43 dscp (100110)
cs1 Use CS1 dscp (001000) [precedence 1]
cs2 Use CS2 dscp (010000) [precedence 2]
cs3 Use CS3 dscp (011000) [precedence 3]
cs4 Use CS4 dscp (100000) [precedence 4]
cs5 Use CS5 dscp (101000) [precedence 5]
cs6 Use CS6 dscp (110000) [precedence 6]
cs7 Use CS7 dscp (111000) [precedence 7]
default Use default dscp (000000)
ef Use EF dscp (101110)
Router(config)# cops ip dscp 63
example specifies the COPS server and enables COPS for RSVP on the server. Both
of these functions are accomplished by using the
cops command on the Cisco uBR10012 router. By
implication, the default settings for all remaining COPS for RSVP commands are
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# ip rsvp policy cops servers 184.108.40.206 220.127.116.11
examples display three views of the COPS for RSVP configuration on the router,
which can be used to verify the COPS for RSVP configuration.
example displays the policy server address, state, keepalives, and policy
Router# show cops servers
COPS SERVER: Address: 18.104.22.168. Port: 3288. State: 0. Keepalive: 120 sec
Number of clients: 1. Number of sessions: 1.
COPS CLIENT: Client type: 1. State: 0.
example displays the policy server address, the ACL ID, and the client/server
Router# show ip rsvp policy cops
COPS/RSVP entry. ACLs: 40 60
Current state: Connected
Currently connected to PDP 22.214.171.124, port 0
example displays the ACL ID numbers and the status for each ACL ID:
Router# show ip rsvp policy
Local policy: Currently unsupported
ACLs: 40 60 . State: CONNECTED.
ACLs: 40 160 . State: CONNECTING.