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This document describes the features, benefits and configuration of Cisco EtherChannel technology on the Cisco Cable Modem Termination System (CMTS).
EtherChannel is a technology by which to configure and aggregate multiple physical Ethernet connections to form a single logical port with higher bandwidth. The first EtherChannel port configured on the Cisco CMTS serves as the EtherChannel bundle master by default, and each slave interface interacts with the network using the MAC address of the EtherChannel bundle master.
EtherChannel ports reside on a routing or bridging end-point. The router or switch uses EtherChannel to increase bandwidth utilization in either half- or full-duplex mode, and load balances the traffic across the multiple physical connections.
EtherChannel on the Cisco CMTS supports inter-VLAN routing with multiple devices and standards, and supports Ten Gigabit EtherChannel (GEC) on the Cisco cBR series routers.
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://tools.cisco.com/ITDIT/CFN/. An account on http://www.cisco.com/ is not required.
Note | The hardware components introduced in a given Cisco IOS-XE Release are supported in all subsequent releases unless otherwise specified. |
Cisco CMTS Platform |
Processor Engine |
Interface Cards |
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Cisco cBR-8 Converged Broadband Router |
Cisco IOS-XE Release 3.15.0S and Later Releases Cisco cBR-8 Supervisor:
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Cisco IOS-XE Release 3.15.0S and Later Releases Cisco cBR-8 CCAP Line Cards: Cisco cBR-8 Downstream PHY Modules: Cisco cBR-8 Upstream PHY Modules: |
This section contains the following:
EtherChannel is based on proven industry-standard technology. The Cisco CMTS supports EtherChannel with several benefits, including the following:
Cisco Ten Gigabit EtherChannel (GEC) is high-performance Ethernet technology that provides gigabit-per-second transmission rates. It provides flexible, scalable bandwidth with resiliency and load sharing across links for switches, router interfaces, and servers.
Ten GEC on the Cisco cBR series routers with the following EtherChannel capabilities:
This section contains the following:
Note |
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Once interface operations are confirmed (prior to this procedure), and EtherChannel configurations have been verified (next procedure), any difficulty experienced through the EtherChannel links may pertain to inter-VLAN or IP routing on the network, or perhaps very high bandwidth consumption.
Additional IP, access list, inter-VLAN or load balancing configurations may be made to the Cisco CMTS and these changes will be supported in the running EtherChannel configuration without service disruption from EtherChannel.
Links can be added or removed from an EtherChannel interface without traffic interruption. If an Ethernet link in an EtherChannel interface fails, traffic previously carried over the failed link switches to the remaining links within the EtherChannel. There are a number of events that can cause a link to be added or removed including adding or removing a link using commands and simulating link failure and recovery (as with (no)shutdown links).
Cisco EtherChannel supports online insertion and removal (OIR) of field-replaceable units (FRUs) in the Cisco CMTS chassis. Ports that remain active during OIR of one FRU will take over and support the traffic bandwidth requirements without service disruption. However, OIR is not described in this procedure.
Command or Action | Purpose |
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The following example illustrates Ten Gigabit EtherChannel information for the port-channel interface of 2.
This configuration is comprised of three Ten GEC port channels as follows:
Router# show interface port-channel 2 Port-channel2 is up, line protocol is up Hardware is GEChannel, address is 8888.8888.8888 (bia 0000.0000.0000) Internet address is 101.101.101.1/16 MTU 1500 bytes, BW 3000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 No. of members in this channel: 3 No. of configured members in this channel: 3 No. of passive members in this channel: 0 No. of active members in this channel: 3 Member 0 : TenGigabitEthernet4/1/0 , Full-duplex, 1000Mb/s Member 1 : TenGigabitEthernet4/1/1 , Full-duplex, 1000Mb/s Member 2 : TenGigabitEthernet4/1/2 , Full-duplex, 1000Mb/s No. of Non-active members in this channel: 0 Last input 00:00:02, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/225/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/120 (size/max) 30 second input rate 17292000 bits/sec, 9948 packets/sec 30 second output rate 17315000 bits/sec, 9935 packets/sec 866398790 packets input, 3324942446 bytes, 0 no buffer Received 2 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 866394055 packets output, 3323914794 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 pause output 0 output buffer failures, 0 output buffers swapped out
Related Topic |
Document Title |
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EtherChannel for Cisco Products |
http://www.cisco.com/warp/public/cc/techno/lnty/etty/fsetch/index.shtml http://www.cisco.com/en/US/tech/tk389/tk213/technologies_white_paper09186a0080092944.shtml |
Configuring Additional Devices for EtherChannel |
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Standards |
Title |
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IEEE Std 802.1Q, 2003 Edition |
IEEE Std 802.1Q, 2003 Edition (Incorporates IEEE Std 802.1Q-1998, IEEE Std 802.1u-2001, IEEE Std 802.1v-2001, and IEEE Std 802.1s-2002) http://ieeexplore.ieee.org/xpl/tocresult.jsp?isNumber=27089 |
Description |
Link |
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Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note | The table below lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. |
Feature Name |
Releases |
Feature Information |
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EtherChannel on the Cisco CMTS |
Cisco IOS-XE Release 3.15.0S |
This feature was introduced on the Cisco cBR Series Converged Broadband Routers. |