Glbp - Cisco Catalyst 4500 Series Configuration Manual

Chapter 1 Product Overview

GLBP

The Gateway Load Balancing Protocol (GLBP) feature provides automatic router backup for IP hosts
configured with a single default gateway on a LAN. Multiple first hop routers on the LAN combine to
offer a single virtual first hop IP router while sharing the IP packet forwarding load. GLBP devices share
packet-forwarding responsibilities, optimizing resource usage, thereby reducing costs. Other routers on
the LAN may act as redundant GLBP routers that will become active if any of the existing forwarding
routers fail. This improves the resiliency of the network and reduces administrative burden.
For details on GLBP, refer to this URL:
http://www.cisco.com/en/US/docs/ios/ipapp/configuration/guide/ipapp_glbp_ps6350_TSD_Products_
Configuration_Guide_Chapter.html
Cisco IOS XE IP Application Services Features in Cisco IOS XE 3.1.0SG
This section list the IP Application Services software features that are supported in Cisco IOS XE
3.1.0SG. Links to the feature documentation are included.
Feature guides may contain information about more than one feature. To find information about a
specific feature within a feature guide, see the Feature Information table at the end of the guide.
Feature guides document features that are supported on many different software releases and platforms.
Your Cisco software release or platform may not support all the features documented in a feature guide.
See the Feature Information table at the end of the feature guide for information about which features in
that guide are supported in your software release. Use Cisco Feature Navigator to find information about
platform support and Cisco software image support. To access Cisco Feature Navigator, go to
http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Gateway Load Balancing Protocol (GLBP), GLBP MD5 Authentication
http://www.cisco.com/en/US/docs/ios/ipapp/configuration/guide/ipapp_glbp.html
HSRP
The Hot Standby Router Protocol (HSRP) provides high network availability by routing IP traffic from
hosts on Ethernet networks without relying on the availability of any single Layer 3 switch. This feature
is particularly useful for hosts that do not support a router discovery protocol and do not have the
functionality to switch to a new router when their selected router reloads or loses power.
For information on configuring HSRP, refer to the following URL:
http://www.cisco.com/en/US/docs/ios/ipapp/configuration/guide/ipapp_hsrp_ps6350_TSD_Products_
Configuration_Guide_Chapter.html
Cisco IOS XE IP Application Services: HSRP Features in Cisco IOS XE 3.1.0SG
This section lists the IP Application Services:HSRP software features that are supported in Cisco IOS
XE 3.1.0SG. Links to the feature documentation are included.
Feature guides may contain information about more than one feature. To find information about a
specific feature within a feature guide, see the Feature Information table at the end of the guide.
Feature guides document features that are supported on many different software releases and platforms.
Your Cisco software release or platform may not support all the features documented in a feature guide.
See the Feature Information table at the end of the feature guide for information about which features in
OL-25340-01
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Layer 3 Software Features
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