Document ID: 12155
Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Difference Between CatOS and Cisco IOS System Software
Catalyst 6500/6000 CatOS and Cisco IOS Software Images
Understand Software Image Name Conventions for CatOS and Cisco IOS Software
Default System Differences Between the CatOS and Cisco IOS Software
Understand Interfaces in Cisco IOS System Software
Interface (Port) Modes in Cisco IOS Software
Configure L2 Ethernet Interfaces
Port Configuration and Status CatOS/Cisco IOS Command Matrix
Understand the Use of the range Command in Cisco IOS Software
Cisco IOS Software Configurations
Configure Trunks in Cisco IOS Software
Configure EtherChannels in Cisco IOS Software
Configure VLANs in Cisco IOS Software
Configure VTP in Cisco IOS Software
CatOS/Cisco IOS Software Command Matrix
NetPro Discussion Forums - Featured Conversations
Related Information
Introduction
This document familiarizes users of Catalyst OS (CatOS) with the Layer 2 (L2) configurations that Cisco IOS® System Software uses. This document covers the similarities and differences between CatOS and Cisco IOS Software for commands and concepts such as ports/interfaces, trunks, channels, VLANs, and Virtual Terminal Protocol (VTP). The document provides a CatOS/Cisco IOS Software Command Matrix for quick reference with regard to the most popular commands.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
This document is not restricted to specific software and hardware versions.
Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.
Difference Between CatOS and Cisco IOS System Software
CatOS on the Supervisor Engine and Cisco IOS Software on the MSFC (Hybrid): A CatOS image can be used as the system software to run the Supervisor Engine on Catalyst 6500/6000 switches. If the optional MSFC is installed, a separate Cisco IOS Software image is used to run the MSFC.
Cisco IOS Software on both the Supervisor Engine and MSFC (Native): A single Cisco IOS Software image can be used as the system software to run both the Supervisor Engine and MSFC on Catalyst 6500/6000 switches.
Note: For more information, refer to the document Comparison of the Cisco Catalyst and Cisco IOS Operating Systems for the Cisco Catalyst 6500 Series Switch.
Catalyst 6500/6000 CatOS and Cisco IOS Software Images
Catalyst 6500/6000 switches have the option to run one of two types of software.
CatOS: This implementation is logically equivalent to a Catalyst 5500/5000 series switch with a Route Switch Module (RSM). When you run in CatOS mode, there are two separate software images. The MSFC runs a traditional Cisco IOS Software image, and the Supervisor Engine runs the traditional CatOS. Each device has its own configuration file.
Cisco IOS Software: This implementation provides a single, "router-like" interface. The division between the router (which has the name Route Processor [RP]) and switch Supervisor Engine (which has the name Switch Processor [SP]) is transparent to the user. There is a single console connection, configuration file, and software image.
Note: You always need an MSFC1 boot image to allow the MSFC1 to load properly. The boot image is necessary for hardware support, and the boot image provides a backup for emergency recovery situations. The software image actually loads the necessary software for full functionality of the router.
A Policy Feature Card (PFC) is necessary in addition to an MSFC.
Understand Software Image Name Conventions for CatOS and Cisco IOS Software
In CatOS, the switch Supervisor Engine and the MSFC run separate software images.
With reference to the Supervisor Engine, there are two different image types: one for Supervisor Engine Is and the other one for Supervisor Engine IIs. The numeral that follows the cat6000-sup prefix denotes the difference in the images.
If a 2 follows the cat6000-sup prefix, the image is for the Catalyst Supervisor Engine II. If a 720 follows the cat6000-sup prefix, the image is for the Catalyst Supervisor Engine 720. If neither a 2 nor 720 follows the cat6000-sup prefix, the image is for the Catalyst Supervisor Engine I. So, for example, a file with the name "cat6000-sup.6-2-3.bin" is for the Supervisor Engine I. A file with the name "cat6000-sup2.6-2-3.bin" is for the Supervisor Engine II. To download these images, refer to Software Download - Catalyst 6500/6000 CatOS System Software.
When you run CatOS with Cisco IOS Software on the MSFC1, MSFC2, or MSFC3, each MSFC type runs its own separate image. The Cisco IOS Upgrade Planner now incorporates these images. To download the image for the MSFC1, MSFC2, or MSFC3, refer to Software Download - Catalyst 6500/6000 Cisco IOS Router Card Software.
Cisco IOS System Software runs a combined software image for both the Supervisor Engine and MSFC daughter card. For the user, there is only one image to load into Flash. The type of Supervisor Engine and MSFC installation categorizes each image. The image categories in the Cisco IOS Upgrade Planner are:
-
Supervisor Engine 720/MSFC3 (CAT6000-SUP720/MSFC3)
-
Supervisor Engine 2/MSFC2 (CAT6000-SUP2/MSFC2)
-
Supervisor Engine 1/MSFC2 (CAT6000-SUP1/MSFC2)
-
Supervisor Engine 1/MSFC1 (CAT6000-SUP1/MSFC1)
To download Cisco IOS System Software images, refer to Software Download - Catalyst 6500/6000 Cisco IOS System Software.
Note: A Supervisor Engine II must use an MSFC2 daughter card; a Supervisor Engine II cannot use the original MSFC daughter card.
To determine which image currently runs, issue the show version command.
Note: In Hybrid mode, issue the show version command on the respective modules to determine the current image they are running.
For example, here, the show version command indicates a Catalyst 6500 with MSFC2 that runs CatOS on the Supervisor Engine and Cisco IOS Software on the MSFC.
Hybrid_Cat6500>(enable) show version
WS-C6509 Software, Version NmpSW: 7.6(4)
Copyright (c) 1995-2003 by Cisco Systems
NMP S/W compiled on Nov 4 2003, 19:22:09
System Bootstrap Version: 5.3(1)
System Boot Image File is 'bootflash:cat6000-supk8.7-6-4.bin'
System Configuration register is 0x2102
Hardware Version: 2.0 Model: WS-C6509 Serial #: SCA043500S2
PS1 Module: WS-CAC-1300W Serial #: SON04340836
PS2 Module: WS-CAC-1300W Serial #: SNI05470791
Mod Port Model Serial # Versions
--- ---- ------------------- ----------- --------------------------------------
1 2 WS-X6K-SUP1A-2GE SAD04500AFW Hw : 7.4
Fw : 5.3(2)
Fw1: 5.4(2)
Sw : 7.6(4)
Sw1: 7.6(4)
WS-X6K-SUP1A-2GE SAD04500AFW Hw : 7.4
Sw :
2 2 WS-X6K-SUP1A-2GE SAL0549F477 Hw : 7.1
Fw : 5.3(1)
Fw1: 5.4(2)
Sw : 7.6(4)
Sw1: 7.6(4)
WS-X6K-SUP1A-2GE SAL0549F477 Hw : 7.1
Sw :
3 48 WS-X6148-GE-TX SAD0746052K Hw : 4.0
Fw : 7.2(1)
Sw : 7.6(4)
4 48 WS-X6248-RJ-45 SAD04281CZY Hw : 1.2
Fw : 5.1(1)CSX
Sw : 7.6(4)
5 48 WS-X6248-RJ-45 SAD042608NZ Hw : 1.2
Fw : 5.1(1)CSX
Sw : 7.6(4)
6 48 WS-X6248-RJ-45 SAD04170CG9 Hw : 1.2
Fw : 5.1(1)CSX
Sw : 7.6(4)
7 48 WS-X6248-RJ-45 SAD04270N9U Hw : 1.2
Fw : 5.1(1)CSX
Sw : 7.6(4)
15 1 WS-F6K-MSFC2 SAD04520C65 Hw : 1.7
Fw : 12.1(19)E1
Sw : 12.1(19)E1
16 1 WS-F6K-MSFC2 SAL0548F2TE Hw : 2.0
Fw : 12.1(19)E1
Sw : 12.1(19)E1
DRAM FLASH NVRAM
Module Total Used Free Total Used Free Total Used Free
------ ------- ------- ------- ------- ------- ------- ----- ----- -----
2 130944K 50017K 80927K 16384K 10857K 5527K 512K 389K 123K
Uptime is 142 days, 4 hours, 27 minutes
Default System Differences Between the CatOS and Cisco IOS Software
|
Features |
CatOS |
Cisco IOS Software |
|---|---|---|
|
Configuration file |
Two configuration files: one for the Supervisor Engine (NMP1) and one for the MSFC |
One configuration file |
|
Software image |
Two images: one for the Supervisor Engine and one for the MSFC |
One software image; an MSFC boot image is also required to allow the MSFC to load properly |
|
Default port mode |
Every port is an L2 switched port |
Every port is an L32 routed port (interface) |
|
Default port status |
Every port is enabled |
Every port (interface) is in the shutdown state |
|
Configuration commands format |
The command keyword set precedes each configuration command |
Cisco IOS command structure with global- and interface-level commands |
|
Configuration mode |
No configuration mode (set, clear, and show commands) |
The commands configure terminal and VLAN database activate configuration modes |
|
Remove/change the configuration |
Via use of the clear, set, and/or enable/disable commands |
Same as Cisco IOS command structure; keyword no negates a command |
1 NMP = Network Management Processor
2 L3 = Layer 3
Understand Interfaces in Cisco IOS System Software
Interface (Port) Modes in Cisco IOS Software
You refer to ports in Cisco IOS Software as interfaces. There are two types of interface modes in Cisco IOS Software:
-
L3 routed interface
-
L2 switch interface
Note: The default is an L3 routed interface.
Configure L2 Ethernet Interfaces
To make a port/interface an L2 switch interface, add the switchport command under the interface, as this example shows:
Cat6500# show running-config interface fastethernet 5/10 Building configuration... Current configuration: ! interface FastEthernet5/10 no ip address switchport end
The default interface configuration for an L2 switch port is different than in CatOS. For example, when a port has an L2 port configuration, the trunk mode is desirable instead of auto. The show interface interface switchport command provides details on the current configuration of an L2 switch port. Here is an example:
Cat6500# show interfaces fastethernet 5/10 switchport Name: Fa5/10 Switchport: Enabled Administrative Mode: dynamic desirable Operational Mode: down Administrative Trunking Encapsulation: negotiate Negotiation of Trunking: On Access Mode VLAN: 1 ( default) Trunking Native Mode VLAN: 1 (default) Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001
There are three main L2 switch port modes in Cisco IOS Software:
-
Access: Sets the interface to nontrunking mode.
-
Dynamic: Sets the interface to dynamically negotiate for access or trunk mode. Two options for this setting are:
-
Desirable: This configuration allows the port to become trunk if the neighbor device has a trunk configuration in the desirable or auto mode. Desirable mode is the default mode when a port has a switch port configuration.
-
Auto: This configuration allows the port to become trunk if the other neighbor has a trunk configuration in the desirable mode.
-
-
Trunk: Sets the interface to permanent trunk mode.
Port Configuration and Status CatOS/Cisco IOS Command Matrix
|
Function |
CatOS |
|---|---|
|
To enable PortFast |
CatOS (enable) set spantree portfast 4/1 enable Warning: Spantree port fast start should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc. to a fast start port can cause temporary spanning tree loops. Use with caution. Spantree port 4/1 fast start enabled. |
|
To configure port for host access. This command enables PortFast and disables trunking and channeling in CatOS. |
CatOS (enable) set port host 4/2 Port(s) 4/2 channel mode set to off. Warning: Spantree port fast start should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc. to a fast start port can cause temporary spanning tree loops. Use with caution. Spantree port 4/2 fast start enabled. Port(s) 4/2 trunk mode set to off. CatOS (enable) |
|
To display the port status |
show port show port mod show port mod/port show port counters show port counters mod/port |
|
Function |
Cisco IOS Software |
|---|---|
|
To enable PortFast |
CiscoIOS(config)# interface fastethernet 4/2 CiscoIOS(config-if)# spanning-tree portfast Warning: portfast should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc. to this interface when portfast is enabled can cause temporary spanning tree loops. Use with CAUTION Portfast has been configured on FastEthernet4/2 but will only have effect when the interface is in a non-trunking mode. CiscoIOS(config-if)# ^Z CiscoIOS# |
|
To configure port for host access. This command enables PortFast and disables trunking and channeling in CatOS. |
CiscoIOS(config)# interface fastethernet 4/2 CiscoIOS(config-if)# switchport CiscoIOS(config-if)# switchport mode access CiscoIOS(config-if)# spanning-tree portfast %Warning: portfast should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc. to this interface when portfast is enabled, can cause temporary spanning tree loops. Use with CAUTION %Portfast has been configured on FastEthernet4/2 but will only have effect when the interface is in a non-trunking mode. CiscoIOS(config-if)# ^Z CiscoIOS# |
|
To display the port status |
show interface status show interface status module mod show interface status errordisabled show interface counters error module mod |
Understand the Use of the range Command in Cisco IOS Software
Even when a switch runs Cisco IOS Software, there is still the potential to have a large number of interfaces. Therefore, to aid in the quick configuration of multiple ports, Cisco IOS Software allows you to configure a range of interfaces simultaneously as in CatOS. If you issue the range command, you can configure many interfaces with the same configuration quickly.
CiscoIOS(config)# interface range gigabitethernet 1/1 -2, fastethernet 4/1 -24
Note: In the syntax of this command, there is a space between the first interface range and the hyphen. Syntax is important and must be absolutely accurate. If a space is not in place, the command-line interface (CLI) returns a syntax error.
These are examples of incorrect usage of the range command:
CiscoIOS(config)# interface range gigabitethernet 1/1-2,fastethernet 4/1-24 ^ % Invalid input detected at '^' marker. CiscoIOS(config)# interface range gigabitethernet 1/1 -2,fastethernet 4/1-24 ^ % Invalid input detected at '^' marker. CiscoIOS(config)# interface range gigabitethernet 1/1 -2,fastethernet 4/1 -24
This example sets the port from 4/2-8 in VLAN 2:
NativeIOS(config)# interface range fastethernet 4/2 -8 CiscoIOS(config-if)# switchport CiscoIOS(config-if)# switchport access vlan 2 CiscoIOS(config-if)# no shut CiscoIOS(config-if)# ^Z CiscoIOS# show interface
After this use of the range command, the configuration appears as this:
interface FastEthernet4/4 no ip address switchport switchport access vlan 2 ! interface FastEthernet4/5 no ip address switchport switchport access vlan 2 ! interface FastEthernet4/6 no ip address switchport switchport access vlan 2 ! interface FastEthernet4/7 no ip address switchport switchport access vlan 2 ! interface FastEthernet4/8 no ip address switchport switchport access vlan 2 ! interface FastEthernet4/9 no ip address shutdown
Cisco IOS Software Configurations
Configure Trunks in Cisco IOS Software
Cisco IOS Software supports both Inter-Switch Link Protocol (ISL) and IEEE 802.1Q (dot1q) trunking modes. Different options for interface configurations are available, as the section Understand Interfaces in Cisco IOS System Software discusses. Trunking works in exactly the same way as in CatOS, except for the default setting in Cisco IOS Software, which is desirable rather than auto.
|
Function |
CatOS |
|---|---|
|
To enable ISL trunk |
CatOS (enable) set trunk 4/1 on isl Port(s) 4/1 trunk mode set to on. Port(s) 4/1 trunk type set to isl. |
|
To enable dot1q trunk |
CatOS (enable) set trunk 4/1 on dot1q
Port(s) 4/1 trunk mode set to on.
Port(s) 4/1 trunk type set to dot1q
CatOS (enable) set vlan 2 4/1
VLAN 2 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
2 1/1
4/1
Note: In the case of dot1q, it is very important that the native VLAN matches across the trunk link. Use the set vlan vlan-id mod/port command in CatOS to set the native VLAN for the trunk. |
|
To change trunk mode |
CatOS (enable) set trunk mod/port {on
| off | desirable | auto | nonegotiate}
[vlans] [isl | dot1q | negotiate]
|
|
To display trunking status |
show trunk show trunk mod show port mod/port |
|
Function |
Cisco IOS Software |
|---|---|
|
To enable ISL trunk |
CiscoIOS# configure terminal Enter configuration commands, one per line. End with CNTL/Z. CiscoIOS(config)# interface fastethernet 4/1 CiscoIOS(config-if)# switchport CiscoIOS(config-if)# switchport trunk encapsulation isl CiscoIOS(config-if)# switchport mode trunk 3d22h: %DTP-SP-5-TRUNKPORTON: Port Fa4/1 has become isl CiscoIOS(config-if)# ^Z CiscoIOS# |
|
To enable dot1q trunk |
CiscoIOS# configure terminal Enter configuration commands, one per line. End with CNTL/Z. CiscoIOS(config)# interface fastethernet 4/1 CiscoIOS(config-if)# switchport CiscoIOS(config-if)# switchport trunk encapsulation dot1q CiscoIOS(config-if)# switchport mode trunk 3d22h: %DTP-SP-5-TRUNKPORTON: Port Fa4/1 has become dot1q CiscoIOS(config-if)# switchport trunk native vlan 2 CiscoIOS(config-if)# ^Z CiscoIOS# |
|
To change trunk mode |
CiscoIOS(config-if)# switchport mode {access |
trunk | multi | dynamic {auto | desirable}}
|
|
To display trunking status |
show interfaces trunk show interfaces trunk module number show interfaces interface-type mod/port show interfaces status |
There are several ways to verify trunk information in Cisco IOS Software.
Note: A routed port is not an L2 trunked port.
The show interfaces trunk command displays all the interfaces that currently trunk. This command does not display ports that have a configuration to trunk but do not actively trunk:
Switch# show interfaces trunk Port Mode Encapsulation Status Native vlan Po41 desirable n-isl trunking 1 Port Vlans allowed on trunk Po41 1-1005 Port Vlans allowed and active in management domain Po41 1-6,1002-1005 Port Vlans in spanning tree forwarding state and not pruned Po41 1-6,1002-1005
The show interfaces trunk module number command shows all the interfaces on the specified module, regardless of trunk status.
Switch# show interfaces trunk module 4 Port Mode Encapsulation Status Native vlan Fa4/1 desirable n-isl trunk-inbndl 1 (Po41) Fa4/2 desirable n-isl trunk-inbndl 1 (Po41) Fa4/3 desirable n-isl trunk-inbndl 1 (Po41) Fa4/4 desirable n-isl trunk-inbndl 1 (Po41) Fa4/5 desirable negotiate not-trunking 1 Fa4/6 desirable negotiate not-trunking 1 Fa4/7 desirable negotiate not-trunking 1 Fa4/8 desirable negotiate not-trunking 1 Fa4/9 desirable negotiate not-trunking 1 Fa4/10 routed negotiate routed 1 Fa4/11 desirable negotiate not-trunking 1 Fa4/12 desirable negotiate not-trunking 1 Fa4/13 desirable negotiate not-trunking 1 Fa4/14 desirable negotiate not-trunking 1 Fa4/15 desirable negotiate not-trunking 1 Fa4/16 desirable negotiate not-trunking 1 Fa4/17 desirable negotiate not-trunking 1
You can use the show interfaces interface-type mod/port trunk command to check the trunking status of a specific interface without the need to scroll through multiple screens.
Switch# show interfaces fastethernet 4/1 trunk Port Mode Encapsulation Status Native vlan Fa4/1 desirable n-isl trunk-inbndl 1 (Po41) Port Vlans allowed on trunk Fa4/1 1-1005 Port Vlans allowed and active in management domain Fa4/1 1-6,1002-1005 Port Vlans in spanning tree forwarding state and not pruned Fa4/1 1-6,1002-1005
The show interfaces status command provides a one-line display for each interface with the status and trunking state.
Switch# show interfaces status Port Name Status Vlan Duplex Speed Type Gi1/1 connected routed full 1000 1000BaseSX Gi1/2 connected 1 full 1000 1000BaseSX Gi3/1 notconnect routed full 1000 missing Gi3/2 notconnect routed full 1000 missing Gi3/3 notconnect routed full 1000 1000BaseSX Gi3/4 notconnect routed full 1000 1000BaseSX Gi3/5 notconnect routed full 1000 1000BaseSX Gi3/6 notconnect routed full 1000 1000BaseSX Gi3/7 notconnect routed full 1000 1000BaseSX Gi3/8 notconnect routed full 1000 1000BaseSX Fa4/1 connected trunk full 100 100BaseFX MM Fa4/2 connected trunk full 100 100BaseFX MM Fa4/3 connected trunk full 100 100BaseFX MM Fa4/4 connected trunk full 100 100BaseFX MM Fa4/5 notconnect 1 full 100 100BaseFX MM Fa4/6 notconnect 1 full 100 100BaseFX MM Fa4/7 notconnect 2 full 100 100BaseFX MM Fa4/8 notconnect 2 full 100 100BaseFX MM Fa4/9 notconnect 1 full 100 100BaseFX MM Fa4/10 notconnect routed full 100 100BaseFX MM Fa4/11 notconnect 1 full 100 100BaseFX MM
Configure EtherChannels in Cisco IOS Software
You configure EtherChannels in Cisco IOS Software much differently than in CatOS. To enable EtherChannel on a group of ports in Cisco IOS Software requires the use of a port channel interface. If all conditions are valid for the group of ports, they form a port channel. By default, all interfaces have port channeling disabled, even when an interface has a switch port configuration.
To configure a group of interfaces to be part of an EtherChannel, you must issue the command channel-group group-number mode channel-mode under each interface individually. If you remove the switchport command from the configuration, all the commands that relate to that switch port no longer show in the configuration. However, the reconfiguration of the port as a switch port returns all the previous commands. As a result, the configuration and the unconfiguration of a port as a switch port does not clear the port channel group information.
Once you have created a channel group, you must issue all of the configuration on the port channel interface and not on the individual physical ports. Any commands that you issue on the port channel propagate to all the physical ports transparently. Commands that you issue on the physical interface of a channel member can remove the interface from the channel group.
|
Function |
CatOS |
|---|---|
|
To create the channel |
CatOS (enable) set port channel 4/3-4 on Port(s) 4/3-4 are assigned to admin group 613. Port(s) 4/3-4 channel mode set to on. CatOS (enable) |
|
To set the channel mode |
CatOS (enable) set port channel
mod/port mode {on | off | desirable |
auto} [silent | non-silent]
|
|
To show the port channel status |
show port channel show port channel mod/port show port channel channel-group |
|
Function |
Cisco IOS Software |
|---|---|
|
To create the channel |
CiscoIOS# configure terminal Enter configuration commands, one per line. End with CNTL/Z. CiscoIOS(config)# interface port-channel 1 CiscoIOS(config-if)# exit CiscoIOS(config)# interface fastethernet 4/3 CiscoIOS(config-if)# channel-group 1 mode on CiscoIOS(config-if)# interface fastethernet 4/4 CiscoIOS(config-if)# channel-group 1 mode on CiscoIOS(config-if)# |
|
To set the channel mode |
CiscoIOS(config-if)# channel-group
channel-group_number mode {on | auto
[non-silent] | desirable [non-silent]}
|
|
To show the port channel status |
show etherchannel show etherchannel channel-group show interfaces etherchannel show interfaces interface-type mod/port etherchannel |
The show etherchannel command has various subcommands to display information about the configuration of the port channels.
The show etherchannel channel-group summary command gives the status of all the interfaces within the channel group configuration. This command is very useful to quickly find the interfaces that are supposed to belong to a channel group.
CiscoIOS# show etherchannel 256 summary Flags: U - in use I - in port-channel S - suspended D - down I - stand-alone d - default setting Group Port-channel Ports -----+------------+----------------------------------------------------------- 256 Po256(U) Fa5/5(I) Fa5/6(I) Fa5/7(I) Fa5/8(I)
The show interfaces etherchannel command displays every interface that associates with a channel group, regardless of the channel status.
CiscoIOS# show interfaces etherchannel ---- GigabitEthernet1/1: Port state = EC-Enbld Up In-Bndl Usr-Config Channel group = 254 Mode = Automatic Gcchange = 0 Port-channel = Po254 GC = 0x00FE0001 Port indx = 0 Load = 0x55 Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Gi1/1 SAC U6/S7 Q 30s 1 128 Any 56 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Gi1/1 69055180(STELLA) 0010.7bbe.50bb 3/4 12s SC 2
You can use the show interfaces interface-type mod/port etherchannel command to check the channel status of a specific interface without the need to scroll through multiple screens.
CiscoIOS# show interfaces fastethernet 5/5 etherchannel Port state = EC-Enbld Up Cnt-bndl Sngl-port-Bndl Cnt-Bndl Not-in-Bndl Usr-Config Channel group = 256 Mode = Automatic Gcchange = 1 Port-channel = null GC = 0x11000002 Port indx = 0 Load = 0x00 Flags: S - Device is sending Slow hello. C - Device is in Consistent state. A - Device is in Auto mode. P - Device learns on physical port. Timers: H - Hello timer is running. Q - Quit timer is running. S - Switching timer is running. I - Interface timer is running. Local information: Hello Partner PAgP Learning Group Port Flags State Timers Interval Count Priority Method Ifindex Fa5/5 SAC U6/S7 Q 30s 1 128 Any 0 Partner's information: Partner Partner Partner Partner Group Port Name Device ID Port Age Flags Cap. Fa5/5 066549452(SINGHA) 00d0.bb3a.c0d9 4/17 29s SC 2 Age of the port in the current state: 00h:30m:31s Probable reason: pm - different in oper mode (1) with Fa5/8(2)
The show interfaces port-channel channel-group etherchannel command displays the ports that are currently active members of the port channel.
CiscoIOS# show interfaces port-channel 256 etherchannel Age of the Port-channel = 05h:52m:49s Logical slot/port = 13/64 Number of ports = 2 GC = 0x01000001 HotStandBy port = null Port state = Port-channel Ag-Inuse Ports in the Port-channel: Index Load Port EC state Configuration ------+------+------+-----------+-------------- 1 55 Fa5/7 auto user 0 AA Fa5/8 auto user Time since last port bundled: 00h:46m:51s Fa5/7 Time since last port Un-bundled: 00h:46m:54s Fa5/8
Configure VLANs in Cisco IOS Software
The concept and functionality of VLANs are identical between Cisco IOS Software and CatOS. However, the configuration methods between the two implementations differ significantly. While set commands create VLANs in CatOS, the VLAN creation occurs via the VLAN database configuration mode in Cisco IOS Software.
|
Function |
CatOS |
|---|---|
|
To create a VLAN |
CatOS (enable) set vlan 2 Vlan 2 configuration successful |
|
To delete a VLAN |
CatOS (enable) clear vlan 2 This command will deactivate all ports on vlan 2 Do you want to continue(y/n) [n]?y Vlan 2 deleted |
|
To assign a port to the VLAN |
CatOS (enable) set vlan 2 1/1 VLAN 2 modified. VLAN 10 modified. VLAN Mod/Ports ---- ----------------------- 2 1/1 |
|
To see the VLAN status |
show vlan |
|
Function |
Cisco IOS Software |
|---|---|
|
To create a VLAN |
CiscoIOS# vlan database CiscoIOS(vlan)# vlan 2 VLAN 2 added: Name: VLAN0002 CiscoIOS(vlan)# exit APPLY completed. Exiting.... |
|
To delete a VLAN |
NativeIOS# vlan database CiscoIOS(vlan)# no vlan 2 Deleting VLAN 2... CiscoIOS(vlan)# exit APPLY completed. Exiting.... |
|
To assign a port to the VLAN |
CiscoIOS# configure terminal Enter configuration commands, one per line. End with CNTL/Z. CiscoIOS(config)# interface gigabitethernet2/2 CiscoIOS(config-if)# switchport CiscoIOS(config-if)# switchport access vlan 2 CiscoIOS(config-if)# ^Z CiscoIOS# |
|
To see the VLAN status |
show vlan |
To check the status of the VLAN, use the show vlan command.
Router# show vlan VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active 2 VLAN0002 active 10 VLAN0010 active 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 0 0 2 enet 100002 1500 - - - - - 0 0 10 enet 100010 1500 - - - - - 0 0 1002 fddi 101002 1500 - - - - - 0 0 1003 tr 101003 1500 - - - - - 0 0 1004 fdnet 101004 1500 - - - ieee - 0 0 1005 trnet 101005 1500 - - - ibm - 0 0 Primary Secondary Type Ports ------- --------- ----------------- ------------------------------------------
Configure VTP in Cisco IOS Software
VTP is an L2 protocol that synchronizes VLAN databases in a VTP domain. At the addition, deletion, or modification of a VLAN within the same VTP domain, VTP synchronizes the VLAN database on all of the members within the same VTP domain. VTP pruning minimizes traffic on trunks through the reduction of unnecessary broadcast and multicast traffic for VLANs that do not need propagation.
In Cisco IOS Software, the VLAN database mode defines the VTP configuration. Changes to the VLAN database and VTP occur at the application of the VLAN data. This occurs when the user exits from the VLAN database configuration mode. The default Cisco IOS Software VTP configuration appears here:
Note: The default VTP mode is Server.
CiscoIOS# show vtp status VTP Version : 2 Configuration Revision : 0 Maximum VLANs supported locally : 1005 Number of existing VLANs : 6 VTP Operating Mode : Server VTP Domain Name : null VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xE2 0x4F 0xC0 0xD6 0x94 0xBB 0x31 0x9A Configuration last modified by 0.0.0.0 at 6-27-01 02:04:20 Local updater ID is 0.0.0.0 (no valid interface found)
|
Function |
CatOS |
|---|---|
|
To configure VTP |
CatOS (enable) set vtp domain cisco VTP domain cisco modified |
|
To change VTP mode |
CatOS (enable) set vtp mode client VTP domain cisco modified CatOS (enable) set vtp mode server VTP domain cisco modified CatOS (enable) set vtp mode transparent VTP domain cisco modified |
|
To enable VTP pruning |
CatOS (enable) set vtp pruning enable This command will enable the pruning function in the entire management domain. All devices in the management domain should be pruning-capable before enabling. Do you want to continue (y/n) [n]? y VTP domain cisco modified |
|
To display the VTP configuration |
CatOS (enable) show vtp domain |
|
Function |
Cisco IOS Software |
|---|---|
|
To configure VTP |
CiscoIOS# vlan database CiscoIOS(vlan)# vtp domain cisco Changing VTP domain name from null to cisco CiscoIOS(vlan)# exit APPLY completed. Exiting.... |
|
To change VTP mode |
CiscoIOS# vlan database CiscoIOS(vlan)# vtp client Setting device to VTP CLIENT mode. CiscoIOS(vlan)# vtp server Setting device to VTP SERVER mode. CiscoIOS(vlan)# vtp transparent Setting device to VTP TRANSPARENT mode. CiscoIOS(vlan)# exit APPLY completed. Exiting.... |
|
To enable VTP pruning |
CiscoIOS# vlan database CiscoIOS(vlan)# vtp pruning Pruning switched ON CiscoIOS(vlan)# exit APPLY completed. |
|
To display the VTP configuration |
CiscoIOS# show vtp status |
CatOS/Cisco IOS Software Command Matrix
This table is a brief list of CatOS commands and the Cisco IOS Software equivalent of the commands. This table is useful for quick reference for migration to Cisco IOS Software from CatOS. The table is an abbreviated list of commands that have frequent use. The table does not list all the parameters for each command. Refer to the Catalyst 6500 Series Cisco IOS Command Reference, 12.2SX for complete command syntax and parameters.
Comments in this section provide assistance with specific commands. The comments appear in italics.
|
CatOS Command |
Cisco IOS Software Command |
|---|---|
|
clear vlan vlan |
no vlan This command is a VLAN database command. |
|
set cam agingtime |
mac-address-table aging-time This command sets MAC address aging time per VLAN. |
|
set cam set cam {static | permanent} |
mac-address-table static All static entries are also permanent. |
|
set errdisable-timeout interval |
errdisable recovery interval 30-86400 This command sets errdisable recovery time. |
|
set mls |
mls Multilayer Switching (MLS) occurs transparently in Cisco IOS Software. |
|
set option errport |
errdisable recovery cause This command configures errdisable options. |
|
set port channel The default mode is auto. |
channel-group group mode The default mode is off. |
|
set port duplex |
duplex The default behavior varies, which depends on the line card. |
|
set port flowcontrol send [desired | off |on ] |
flowcontrol send [desired | off | on ] |
|
set port flowcontrol receive [desired | off |on ] |
flowcontrol receive [desired | off | on ] |
|
set port host |
switchport switchport mode access spanning-tree portfast The access ports automatically have channeling/trunking turned off. |
|
set port negotiation mod/port disable |
speed nonegotiate Use this command on gigabit ports only. Use speed and duplex commands for 10/100 Mbps ports. |
|
set port negotiation mod/port enable |
no speed nonegotiate Use this command on gigabit ports only. Use speed and duplex commands for 10/100 Mbps ports. |
|
set port speed |
speed The default behavior varies, which depends on the line card. |
|
set qos |
mls qos |
|
set span |
monitor session |
|
set spantree |
spanning-tree |
|
set system crossbar-fallback |
service internal [no] fabric switching-mode allow [bus-only | truncated] |
|
set test diaglevel |
diagnostic level This is the bootup diagnostic level. |
|
set trace |
debug Use this command with caution. Some debugs are intrusive. |
|
set trunk The default mode is auto. |
switchport mode trunk The default mode is desirable. |
|
set udld |
udld You configure this command globally and per interface. |
|
set vlan |
vlan switchport access vlan This command is a VLAN database command. The command is an interface command and does not create the VLAN. |
|
set vtp |
vtp This command is a VLAN database command. |
|
show boot |
show bootvar This command shows boot parameters. |
|
show cam dynamic |
show mac-address-table dynamic |
|
show channel info show port channel |
show etherchannel summary |
|
show errordetection |
show errdisable detect |
|
show errdisable-timeout |
show errdisable recovery |
|
show port show mac |
show interface |
|
show port status |
show interface status |
|
show span |
show monitor |
|
show sprom |
show idprom This command is useful to determine the chassis serial numbers. |
|
show system crossbar-fallback |
show fabric switching-mode |
|
show test [diaglevel | mod] |
show diagnostic [level | mod module] |
|
show qos |
show mls qos |
|
show traffic |
show catalyst6000 traffic-meter This command displays backplane utilization. |
|
show trunk show port trunk |
show interfaces trunk |
|
show udld |
show udld |
|
show vlan |
show vlan |
|
show vtp domain |
show vtp status |
|
switch console |
remote login Use this command only with Cisco Technical Support for a specific troubleshoot. |
NetPro Discussion Forums - Featured Conversations
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Related Information
- LAN Product Support Pages
- LAN Switching Support Page
- Tools & Resources
- Technical Support & Documentation - Cisco Systems
| Updated: Jan 10, 2006 | Document ID: 12155 |