Cisco WS-C6506 User Manual

23-22
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 23 Configuring Redundancy
MSFC Redundancy
Layer 3 Redundancy for a Single Chassis
In a single Catalyst 6500 series chassis, you can have the redundant supervisor engines, each with an
MSFC. You can configure Hot Standby Router Protocol (HSRP) on the MSFCs to provide transparent
default gateway redundancy for the IP hosts in the network. HSRP configuration can coexist with the
IPX and AppleTalk configuration on the same interfaces.
If one MSFC fails, HSRP allows one MSFC (router) to assume the function automatically of the other
MSFC. Combined with the high-availability feature of supervisor engine software release 5.4(1), this
configuration provides an added level of redundancy for your network.
Caution You must configure both MSFCs identically. Table 23-2 summarizes the identical requirements and the
exceptions for Layer 3 redundancy for a single switch chassis.
For information on specifying the alternate configurations for the interface and global level exceptions
that are listed in Table 23-2, see the “alt Keyword Usage” section on page 23-36.
The redundant supervisor engines must have identical hardware (MSFC and PFC). See the “Hardware
and Software Requirements” section on page 23-21 for more information.
Note For the MSFC and MSFC2 memory requirements, refer to the Release Notes for MSFC publication at
this URL: http://www.cisco.com/en/US/products/hw/switches/ps708/prod_release_notes_list.html
Table 23-2 Single Chassis Layer 3-Redundancy Requirements
Identical Requirements—
Global and Interface Levels Exceptions—Interface Level Exceptions—Global Level
• Both MSFCs must have the
following:
– Same routing protocols
– Same static routes
– Same default routes
– Same policy routes
– Same VLAN interfaces
– Same Cisco IOS ACLs
1, 2
• All interfaces must have the
same administrative status
1. The dynamic and reflexive ACLs, which are based on actual data flow, may be programmed by either MSFC.
2. In addition to defining the same ACLs on both MSFCs, you must also apply the ACLs to the same VLAN interfaces in the
same direction on both MSFCs.
• HSRP standby commands
• IP address commands
3
• IPX network
3
3. The IP or IPX addresses do not have to be identical on both MSFCs, but there must be an IP or IPX address configured on
both MSFCs.
• IP default-gateway
• IPX internal-network
• IPX default-route

Cisco WS-C6506 Specifications

General

Brand	Cisco
Model	WS-C6506
Category	Switch
Language	English