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Configuring the Channelized 12-port CT3/T1
Optical Services Modules
This chapter describes how to configure the 12-port channelized/unchannelized DS3 Optical Services
Modules (OSM-12CT3/T1).
The chapter consists of these sections:
•
•
•
Understanding the Channelized/Unchannelized CT3/T1 Modules
The OSM-12CT3/T1 module provides 12DS3 interface connections using mini-SMB connectors.
Each DS3 port can be independently configured all the way from a clear channel DS3 down to and
including DS1, E1,and DS0 connections on the same port, with a maximum of 128 channels per DS3
port.
Each OSM-12CT3/T1 can support any combination of DS3/DS1/E1/T1s up to 1023 channels. For
example, each port can support the following:
•
•
•
•
An unchannelized DS3 connection provides a single serial interface data channel that may be configured
to use all of the DS3 bandwidth or a fractional portion of it. This mode is compatible with several
vendors of fractional (subrate) DS3 data service units (DSUs).
A cost, depending on the bandwidth, is associated with a serial interface. The total cost possible for 12 DS3
ports is 4096. That is, the sum of the costs of all the serial interfaces configured on 12 DS3 ports must be no
more than 4096. The show controller t3 command displays the VC cost, which indicates the available cost
of 12 DS3 ports.
OL-9465-03
Understanding the Channelized/Unchannelized CT3/T1 Modules, page 7-1
Supported Features, page 7-2
Configuring the Interfaces, page 7-6
1 DS3 at 44.7 Mbps
21 E1s at 2.048Mbps
28 DS1s at 1.5 Mbps
128 DS0s at 64 Kbps
Table 7-1
shows the cost associated with each link type.
C H A P T E R
Optical Services Modules Installation and Configuration Note, 12.2SR
7
7-1
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Related Manuals for Cisco OSM-12CT3/T1 - Optical Services Module Multiplexor
Summary of Contents for Cisco OSM-12CT3/T1 - Optical Services Module Multiplexor
- Page 1 C H A P T E R Configuring the Channelized 12-port CT3/T1 Optical Services Modules This chapter describes how to configure the 12-port channelized/unchannelized DS3 Optical Services Modules (OSM-12CT3/T1). The chapter consists of these sections: Understanding the Channelized/Unchannelized CT3/T1 Modules, page 7-1 •...
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Page 2: Supported Features
Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Supported Features Table 7-1 Serial Interface Cost Link Type Cost Unframed E1 1-6 DS-/TS 7-9 DS0/TS 10-16 DS0/TS 17-24 DS0/TS 25-31 TS Channelized DS3 Overview In the channelized mode of operation, an OSM-12CT3/T1 link is channelized into 28 DS1 or 21 E1 data lines in an industry standard multiplexing format. -
Page 3: General Features
IOS Wide-Area Networking Command Reference, Release 12.1 at: http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan_c/wcdfrely.htm http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan_r/wrdfrely.htm Configure traffic shaping for Frame Relay as described in the Cisco IOS Quality of Service Solutions Configuration Guide under “Configuring Distributed Traffic Shaping” at: http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/fqcprt4/qcfdts.h For information on Multilink Frame Relay (FRF.16), see •Multilink Frame Relay (FRF.16),... - Page 4 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Supported Features DSU Mode Unchannelized DS-3 supports subrate and scrambling formats for the following DSUs. Digital Link • Verilink • Adtran • • Larscom • Kentrox T1 Configuration Options The T1 lines have the following configuration options: •...
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Page 5: Network Management
Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Supported Features Fractional E1 lines contain only a single logical channel group that can be either a single 64-kbps timeslot or a range of timeslots; for example timeslot 1, or timeslots 15-23. Any unused timeslots are filled with programmable idle-channel data. -
Page 6: Configuring The Interfaces
Low latency queuing (LLQ) on the WAN ports. • For general information on classification, marking, and queuing in IOS, refer to the “Classificiation” chapter of the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.1 at this URL: http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_c/index.htm For information about platform-independent IOS QoS commands, refer to the Cisco IOS Quality of Service Solutions Command Reference, Release 12.1at this URL:... - Page 7 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Command Purpose Step 1 Enters configuration mode and specifies that the Router# configure terminal console terminal is the source of the configuration subcommands. Step 2 Selects a port and enters controller configuration Router(config)# controller t3 slot/port mode.
- Page 8 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces IP addresses can not be assigned to main interfaces configured for Frame Relay. Note To configure the unchannelized DS3 interfaces, perform this task: Command Purpose Step 1 Enters configuration mode and specifies that the Router# configure terminal console terminal is the source of the configuration...
- Page 9 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Configuring the Channelized DS3 Interface The DS3 Interface can be channelized down to T1 and E1 links. These sections provide configuration information for T1 and E1 link configuration: •...
- Page 10 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Command Purpose Step 1 Enters configuration mode and specifies that the Router# configure terminal console terminal is the source of the configuration subcommands. Step 2 Enters controller configuration mode. Router(config)# controller t3 slot/port Step 3 Configures the channel group.
- Page 11 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Command Purpose Step 1 Enters configuration mode and specifies that the Router# configure terminal console terminal is the source of the configuration subcommands. Step 2 Selects the controller. Router(config)# controller slot/port Step 3 Specifies the channelization mode.
- Page 12 Cisco 7200 series routers, which each have one MLPPP bundle of four T1 lines. Another OSM-12CT3/DS interface has been configured with MLPPP to carry two bundles of two T1 lines. One of these bundles goes out to a Cisco 2500 series router and the other goes out to a Cisco 3800 series router.
- Page 13 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Assigning an Interface to a Multilink Bundle To assign an interface to a multilink bundle, use the following commands in interface configuration mode: Command Purpose Step 1 Selects the interface.
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Page 14: Verifying The Configuration
Router(config-if)# ppp multilink Router(config-if)# multilink min-links 5 mandatory For additional information about the Multilink PPP Minimum Links Mandatory feature, refer to this URL: http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121limit/121e/121 e11/12e_mlp.htm#xtocid0 The commands listed at this URL are all supported on the OSM-12CT3/T1, except the following: multilink max-link •... - Page 15 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces ppp chap hostname mul1 multilink-group 1 interface serial6/12/2:0 no ip address encapsulation ppp ppp chap hostname mul1 multilink-group 1 interface serial6/12/3:0 no ip address encapsulation ppp ppp chap hostname mul1 multilink-group 1 show ppp multilink Multilink1, bundle name is mul1...
- Page 16 Chapter 7 Configuring the Channelized 12-port CT3/T1 Optical Services Modules Configuring the Interfaces Optical Services Modules Installation and Configuration Note, 12.2SR 7-16 OL-9465-03...