Table Of Contents
Cisco High-Speed Intrachassis Module Interconnect (HIMI) Feature Module
This document describes how to use the Cisco High-Speed Intrachassis Module Interconnect (HIMI) feature. The HIMI feature provides the capability to establish a connection between two enhanced network modules (NME) or between the onboard small-form-factor pluggable (SFP) Gigabit Ethernet module and an NME on the Cisco 3825 and Cisco 3845 routers. Currently, Cisco EtherSwitch service modules are the only NMEs that support HIMI.
The HIMI feature provides a dedicated, point-to-point internal connection from an enhanced network module (NME) to another NME or to the onboard Gigabit Ethernet SFP port on a Cisco router. The HIMI feature is a Layer 2 connection that can scale up to 1 Gbps. The HIMI feature supports a maximum of two NMEs per router chassis.
HIMI Feature Interconnection Modes
There are two Gigabit Ethernet ports on the Cisco 3800 series routers:
•Port 1 (g0/1) is a fixed 10/100/1000BASE-T RJ-45 port.
•Port 0 (g0/0) can be configured as a 10/100/1000BASE-T RJ-45 or an SFP module slot port.
HIMI features are only supported on Gigabit Ethernet port g0/0. Gigabit Ethernet port g0/0 can operate simultaneously in two physical modes through the HIMI feature: RJ-45 mode or SFP mode. You use the media-type [rj45 | sfp] interface configuration command to enable either the RJ-45 or SFP mode on port g0/0. RJ-45 is the default. HIMI features work in the following two modes:
•In RJ-45 mode, port g0/0 can still be used to connect to local LAN traffic. In addition, the SFP module port on the router can be internally connected to a NME through the HIMI connection. For example:
–SFP port g0/0 on the router can be internally connected to an Cisco EtherSwitch service module in slot 1 or 2 in a Cisco 3825 router.
–SFP port g0/0 on the router can be internally connected to an Cisco EtherSwitch service module in slot 2 or 4 in a Cisco 3845 router.
This provides an optical Gigabit Ethernet port to a Cisco EtherSwitch service module.
•In SFP mode, the SFP port g0/0 cannot be used in a HIMI connection, however, NMEs can be internally connected through the HIMI feature. For example:
–The Cisco EtherSwitch service modules in slot 1 and 2 of a Cisco 3825 router can be interconnected.
–The Cisco EtherSwitch service modules in slot 2 and 4 of a Cisco 3845 router can be interconnected.
These internal connections trunk the two Cisco EtherSwitch service modules without requiring an external cable.
Note The Cisco EtherSwitch service modules must be in steady state during the HIMI feature interconnection. For steady state information, see the "Cisco EtherSwitch Service Module Configuration" section.
The information in this document is based on these software and hardware versions:
•Cisco IOS software Release 12.4(2)T running on the Cisco 3825 or Cisco 3845 router
•Cisco IOS software Release 12.2(25)EZ running on the Cisco EtherSwitch service module
•Cisco 3825 and Cisco 3845 integrated services routers
•Cisco EtherSwitch service modules
Note The information presented in this document resulted from the use of devices in a specific lab setup and environment. If you are working in a live network, ensure that you understand the potential impact of any command before you use it.
This section describes how to configure a Cisco 3800 series router and the Cisco EtherSwitch service module to use the HIMI feature:
This section describes how to configure a Cisco 3800 series router to use the HIMI feature.
When the onboard Gigabit Ethernet SFP port (port g0/0) is used to connect to a Cisco EtherSwitch service module, the RJ-45 Gigabit Ethernet port 0/0 can still be used for routing traffic to other modules and interfaces in the router.
Note To connect the onboard Gigabit Ethernet SFP port (port g0/0) with a Cisco EtherSwitch service module using the HIMI feature, the Gigabit Ethernet 0/0 interface must be placed in RJ-45 mode. This is not necessary when a HIMI connection is set up between two Cisco EtherSwitch service modules.
When the HIMI connection is not used, the onboard Gigabit Ethernet 0/0 interface supports either RJ-45 or SFP connections with external devices, but not at the same time. The Gigabit Ethernet 0/1 interface does not support SFP mode.
Enable the media type (RJ-45) on the router:
Cisco3825 (config)# interface gigabitethernet g0/0
Cisco3825 (config-if)# media-type rj45
Note For additional information on the commands used in this document, use the Cisco IOS Command Lookup tool. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.
Cisco EtherSwitch Service Module Configuration
This section describes how to verify a steady state on the service module. This section also describes which Gigabit Ethernet ports to use on the service modules.
You can use the HIMI feature to connect the onboard Gigabit Ethernet SFP port (port g0/0) on the
Cisco 3800 series router to Cisco EtherSwitch service modules.
Note Make sure the Cisco EtherSwitch service modules are installed in the router chassis.
Before a connection is made, an RBCP steady state is used to mark the segment status as up or down and show that the router and the Cisco EtherSwitch service module can successfully communicate. Use the show service-module status command to verify that the service module is in steady state:
service module# show service-module status
Service Module is in STEADY state
Once the steady state is established, connect the Gigabit Ethernet port 0/0 on the router to an internal Gigabit Ethernet port on the service module.
The following list shows which internal Gigabit Ethernet port to use on each model of the Cisco EtherSwitch service modules:
•NME-16ES-1G—Gigabit Ethernet port 1/0/1
•NME-X-23ES-1G—Gigabit Ethernet port 1/0/1
•NME-16ES-1G-P—Gigabit Ethernet port 1/0/1
•NME-X-23ES-1G-P—Gigabit Ethernet port 1/0/1
•NME-XD-24ES-1S-P—Gigabit Ethernet port 1/0/1
•NME-XD-48ES-2S-P—Gigabit Ethernet port 1/0/3
Note If the service module is removed or inserted, the HIMI feature is notified of the removal or insertion, and the HIMI feature sets the associated segment to a changed state. The corresponding partner segment is then notified of the change in segment status.
Connect to the HIMI Feature
This procedure describes how to connect the router with a Cisco EtherSwitch service module through the HIMI feature or to connect a Cisco EtherSwitch service module to another Cisco EtherSwitch service module.
1. connect connection-name module interface-name slot/port Channel-ID module interface-name slot/port Channel-ID
3. show connection all
5. show service-module status
6. show interface interface-name
7. no connect connection-name
This section provides the following examples:
Sample Output for the show connection all Command on the Router
The following example shows the HIMI connection between the onboard Gigabit Ethernet port 0/0 on the router and the Cisco EtherSwitch service module in slot 2:
router# show connection allID Name Segment 1 Segment 2 State========================================================================5 himi GigabitEthernet2/0 0 GigabitEthernet0/0 0 UP
Table 1 describes the fields in the output display for the show connection all command.
Sample Output for the show service-module status Command on the Cisco EtherSwitch Service Module
The following example shows using the show service-module status privileged EXEC command from the from the Cisco EtherSwitch service module. In the example, the connection between the Cisco EtherSwitch service module Gigabit Ethernet port 1/0/4 and the internal Gigabit Ethernet port 1/0/3 is verified.
service module# show service-module statusService Module is in STEADY stateService Module target interface is GigabitEthernet1/0/4Interface GigabitEthernet1/0/3 is connected to BACKPLANE
Sample Output for the show interface Command on the Router
The following example shows what appears when you enter the show interface command. In this example, Gigabit Ethernet port 0/0 status is shown as well as SFP status participating in the HIMI connection.GigabitEthernet0/0 is up, line protocol is upSFP in use with an NME in Module InterconnectionHardware is BCM1125 Internal MAC, address is 0000.0c00.1111 (bia 0005.9a3d.7440)
Note If the speed and duplex setting for g0/0 in SFP mode is speed=1000 and duplex=full, autonegotiation is in forced mode and autonegotation is turned off. For all other mode settings of speed or duplex for SFP, autonegotiation is turned on.
If speed=1000 and duplex=full modes are specified for both g0/0 and g0/1 interfaces in copper mode (RJ-45), autonegotiation is still turned on. This is considered to be in forced mode for speed=1000. This occurence is per the Annex 28D.5 extensions required for clause 40 (1000-BASE-T) IEEE 802.3.
When the speed and duplex modes are forced for 10/100, and full or half modes are forced for g0/0 and g0/1 interfaces, autonegotiation is turned off. If the interfaces are not in forced mode for 10/100 speeds, then autonegotation will be turned on.
•Cisco EtherSwitch Service Modules chapter in the Install and Upgrades Guide at the following URL:
•Cisco EtherSwitch Service Modules (NME-16ES-1G-P, NME-X-23ES-1G-P, NME-XD-48ES-2S-P, NME-XD-24ES-1S-P) feature module at the following URL:
•Cisco 3800 Series Hardware Installation guides at the following URL:
•Cisco 3800 Series Integrated Services Routers Quick Start Guide at the following URL:
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