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HSRP stops working when an ACL is applied, how to permit HSRP through the ACL

Core Issue

The most common reason for this problem is that the Hot Standby Router Protocol (HSRP) hello packets are not being permitted through the Access Control List (ACL).


Permit the destination address of the HSRP hello packet The router's primary IP address is the source address. A sample ACL command follows:

access-list 101 permit ip host <source-address> host

For more information on HSRP, refer to Hot Standby Router Protocol Features and Functionality


Multiple devices

Source and Destination Physical Connectivity

Source and destination exist on same subnetwork

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Last update:
‎06-22-2009 03:32 PM
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