CISCOSB-IPSTDACL-MIB

Description: Handles standard IP access control lists used for packet filtering on Cisco Small Business devices.

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CISCOSB-IPSTDACL-MIB is a private Cisco Small Business MIB for configuring standard IP access control lists (ACLs) that filter traffic based on source address alone, on small-business switches and routers. It is primarily a configuration MIB, exposing ACL and access-control-entry (ACE) definitions including the ACL name, ACE index, source-address classification type, source IP address and prefix length, and analogous destination fields. Its relevance to device status monitoring is indirect: rather than reporting hardware health, it lets an administrator audit which ACLs and ACEs are currently configured, so unexpected traffic drops can be correlated with an entry that is filtering more broadly than intended, or an ACL entry that is missing/misconfigured. It is a vendor-private MIB with no formal dependency on IETF standard MIBs, though it parallels IP-standard-ACL concepts from Cisco IOS. It is deployed on Cisco Small Business switches and routers for basic packet-filtering security policy. Network engineers evaluating or troubleshooting this functionality can download the CISCOSB-IPSTDACL-MIB file directly to load it into their MIB browser.

An administrator troubleshooting unexpected traffic loss would walk rlIpStdAclTable/rlIpStdAclEntry, keyed by rlIpStdAclAclName and rlIpStdAclAceIndex, to review each ACE's rlIpStdAclSrcIpAddr and rlIpStdAclSrcPrefLen and confirm whether a legitimate source subnet is being inadvertently blocked. Comparing the configured rlIpStdAclSrcClassificationType against the intended filtering policy helps catch ACL misconfigurations introduced during a recent change. This is primarily a configuration-audit use case rather than a live performance-counter one.

Manages Cisco Small Business standard IP access control lists for packet filtering.