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1. What does bia stand for in a cisco mac address software#
2. What does bia stand for in a cisco mac address series#

MAC addresses used for Spanning Tree calculations are stored in an EEPROM present in the Supervisor module. MAC Addresses for Spanning Tree Computation

What does bia stand for in a cisco mac address series#

In Cisco 2940, and 2950/2955 series switches you can change the MAC address of switch ports using the command mac-address, under the interface configuration mode. In Cisco 6500/6000, 4500/4000, 3750, 3560, 3550, and 2970 series switches, you are not able to change the MAC address on a switchport. MAC addresses of Layer 2 Interfaces (Switchports) are unique and are assigned to that particular line module. The Catalyst 3550 switches, Catalyst 4500/4000 switches with Supervisor Engine III/IV, and Catalyst 6500 switches with Supervisor Engine 720 support up to 256 unique HSRP group IDs in the 0 to 255 range. HSRP Group Limitation on Catalyst 6500/6000 Series Switches Frequently Asked Questions In order to understand the HSRP group limitation on the Catalyst 6500/6000, refer to this document: So you must understand and use different HSRP groups when possible. Note: A Hot Standby Router Protocol (HSRP) group uses the same virtual MAC address if the HSRP group ID is reused on multiple interfaces. Therefore, the switches can have the same MAC address on multiple VLAN interfaces without issue. This support allows the switches to maintain a MAC address table per VLAN. Cisco switches support a per-VLAN MAC address table or content-addressable memory (CAM) table. Also, you do not need to change the MAC address if the switches support a per-VLAN MAC address table. You do not need to change the burned-in MAC address if the network devices support multiple IPs to a single MAC Address Resolution Protocol (ARP) table, which is common. However, the MAC address on all three VLAN interfaces is the same, even though the IP addresses are different.Ĭatalyst switches have varied support for the ability to change the MAC address for a VLAN (SVI) or 元 interface. The diagram in this section shows a Catalyst 6500 with Supervisor Engine 2 and MSFC2. MAC Address on a VLAN (SVI) or 元 Interface on Catalyst Switchesīy default, Catalyst switches come with the same MAC address configured on all interfaces. Note: For more information, refer to Comparison of the Cisco Catalyst and Cisco IOS Operating Systems for the Cisco Catalyst 6500 Series Switch.

What does bia stand for in a cisco mac address software#

If the optional MSFC is installed, a separate Cisco IOS Software image is used to run the MSFC.Ĭisco 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. Difference Between CatOS and Cisco IOS System SoftwareĬatalyst OS (CatOS) on the Supervisor Engine and Cisco IOS® Software on the Multilayer Switch Feature Card (MSFC) (Hybrid): a CatOS image can be used as the system software to run the Supervisor Engine on Catalyst 6500/6000 switches. Refer to Cisco Technical Tips Conventions for more information on document conventions. This document is not restricted to specific software and hardware versions. There are no specific requirements for this document. This document describes support for the configuration of a unique MAC address on VLAN (switched virtual interface ) or Layer 3 (元) interfaces on Cisco Catalyst switches.