InterfaceIndex. They claim to be very "IOS-like". Cisco routers have the potential for the same type of problem. The Circuit Interface Identification Persistence for SNMP feature maintains the user-defined name of the circuit (defined in the cciDescr object) across reboots, and allows the advanced users of Simple Network Management Protocol (SNMP) to consistently identify the circuits. If snmp-server ifindex persist is not used, then it is possible that ifIndexes are mapped differently than before. Verifying the IfIndex Persistence To configure the refresh interval for the IF-MIB statistics cache, use the snmp-server ifmib internal cache max-duration command in global configuration mode. This should be on a line that also identifies the switch port in question. Under which circumstances SNMP ifIndex in Cisco IOS might change? IOS Version 12.2 (50)SE3. This example shows how to enable ifIndex persistence globally: RP/0/ RP0 /CPU0:router (config)# snmp-server ifindex persist snmp-server ifmib internal cache max-duration. RouterA(cofig)#snmp-server ifindex persist #snmp get v2c 127.0.0.1 public oid 1.3.6.1.2.1.2.2.1.2.1 %SNMP manager not enabled. TABLE OF CONTENTS Current Objects Scalars ifXTable ifStackTable ifRcvAddressTable Deprecated Objects Deprecated Scalars ifTestTable Notifications Textual Conventions 20 Helpful Share Reply Joe Clarke Hall of Fame Cisco Employee 04-12-2007 05:34 AM To find the actual port with the issue, convert the ifIndex number to Hexadecimal (i.e. I think the ifindex is changing, but why? The file is in a relatively human readable format and has a comment at the top indicating the last time it was written. The Simple Network Management Protocol (SNMP) is an application layer protocol that facilitates the exchange of management information between an agent and a management server. Provide view-only access to ospfIfEntry and ospfNbrEntry. Thanks in advance. Restrict the SNMP community to only the monitoring server with IP address 198.18.19.100/32. Cacti Version 0.8.7b. It is always the case that when you have an INDEX object that is readable (MAX-ACCESS is a value other than not-accessible ), the value of the object (the "right side" as you put it in your question) is equal to the value encoded into the instance identifiers (the left side). This is a summary of information regarding objects below the interfaces MIB object, which is defined within the IF-MIB MIB document as .1.3.6.1.2.1.2. From RFC 2863: The requirement for constancy (between re-initializations) of an interface's ifIndex value is met by requiring that after an interface is . 2 In Cisco IOS each interface has unique ifIndex which is an integer >0 (AFAIK usually starts from 1). This behavior can very easily break network monitoring systems, as the interface indexes they request can be dynamically assigned to different interfaces during a reboot. Sample Selection Methods, Garmin Fenix 7 Activity Tracking, , Garmin Fenix 7 Activity Tracking, SNMP enables network administrators to monitor and manage network performance, find and solve network problems, and plan for network growth. Debugging 2022. switch#sh run | i persist. Search the file for the hex number referenced. Enable interface index persistence. Not all graphs of this device are affected. Step 1. This is where SNMP interface index persistence can help. The following definitions are based on RFC 2233, "The Interfaces Group MIB using SMIv2." The following terms are values in the Interfaces MIB (IF-MIB): Enables SNMP ifIndex persistence on the . Both commands "snmp-server ifindex persist" and "snmp ifmib ifindex persist" are supported on the Cisco 7606-S core router from a configuration point of view. Answer For the Junos OS Release 10.0 and earlier, the ifIndex is persistent when reboots occur if the Junos OS version remains the same, meaning the values assigned to the interfaces in the ifIndex do not change. Short answer, the SNMP RFCs do not require ifIndex persistence between network manager reinitialization. How does Windows deal with the SNMP interface index? Home. CISCO. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp The index of each interface can be determined with the command show snmp mib ifmib ifindex. The "snmp-server ifindex persistence" global configuration command enables and disables ifIndex persistence for all interfaces on the routing device (this applies only to interfaces that have ifDescr and ifIndex entries in the ifIndex table of the IF-MIB). /var/db/dcd.snp_ix is the file where SNMP ifindex information is stored. The feature is enabled globally: Router (config)# snmp-server ifindex persist 1. switch#show snmp mib ifmib ifindex Port-Channel 2000 It can check for keywords. As Jared said, the most likely culprit would be related to some software upgrades. 6. New interfaces are added to the index. Router (config-if)# snmp ifindex persist. Tag number in the "snmp contact" field: XYZc4X01(config)# snmp-server contact [#AssetTag#] 2) On the Cat4500X, copy the running configuration to startup configuration. IFindex can change when new interfaces come on line new interface include sub interface and loopback in order to keep persistent values for assigned interfaces we can use the command snmp=server ifindex persist snmp-server group cisco-prime-group v3 auth snmp-server group NNM-NET-6KJFV-group v3 auth read NNM-NET-6KJFV-view write no-write snmp-server view saa-view mib-2 included snmp-server view zabbix-view mib-2 included snmp-server view cisconos-view mib-2 included snmp-server enable traps envmon fan shutdown supply temperature status snmp ifmib ifindex persist A command applied to an interface is automatically applied to all the subinterfaces associated with that interface. After that I saw some (existing) graphs changing his view, some showed no input traffic, but there is still traffic. ifIndex SNMP (Simple Network Management Protocol) ID 1 ifIndex first come first serve ifindex SNMP snmp-server ifindex persist ifIndex Catalyst 3650 snmp ifmib ifindex persist. >snmp mib ifmib ifindex . Error: Network error: Unexpected token G in JSON at position 0. In Cisco IOS there is the command snmp ifmib ifindex persist When set in the configuration, if interfaces are added to the Cisco device, the existing interfaces keep their index number. To enable SNMP ifIndex persistence only on a specific interface, perform this task: Command. lab at Denver> file show /var/db/dcd.snmp_ix /* That is, ifIndex.X = X, always, because ifIndex is the INDEX for . 20160927. However, operation wise, the card index is not persistent, i.e. Generate diagnostics from the switch if you haven't already. if you remove a network card from the chassis and put it back, the index is likely to change. Net-SNMP INTRODUCTION This is a summary of information regarding objects below the ifMIBObjects MIB object, which is defined within the IF-MIB MIB document as .1.3.6.1.2.1.31.1 . Router (config)# interface { vlan vlan_ID } | { type slot/port } | { port-channel port_channel_number } Selects an interface to configure. That's the quickest way to find the . ifIndex 264 = hex 0x108). Try again. interface Loopback1 description Loopback for management vrf ip vrf forwarding management ip address 10.219.49.3 255.255.255.255 ! 1 Answer. October. snmp-server >ifindex persist . Purpose. 2.6 4500X switch staging at warehouse completed - Unofficial Checklist The below table is an Unofficial Checklist, to be performed after staged at warehouse RouterA#show snmp mib ifmib ifindex FastEthernet0/0: Ifindex = 1 Null0: Ifindex = 7 Serial1/0: Ifindex = 3 FastEthernet0/1: Ifindex = 2 . If you used the GUI - Untar the diags to a text file. The interface-specific ifIndex persistence command ( [no] snmp ifindex persistence) can not be used on subinterfaces. 11. . snmp ifmib ifindex persist Last Modified Mar 02, 2018 Products (1) Cisco Catalyst 3750 Series Switches Known Affected Release 12.2 (50)SE3 Description (partial) Step 2. sh snmp ifmib ifindex - this is a good command to look at what assigned index was givn to a particular interface. SNMPCiscoInterfaceIndex. Sorted by: 5. rtr1841#show snmp mib ifmib ifindex Loopback1: Ifindex = 10 Tunnel0: Ifindex = 5 Serial0/0/0: Ifindex = 7 FastEthernet0/1: Ifindex = 2 FastEthernet0/0.2: Ifindex = 8 Loopback0: Ifindex = 6 Null0: Ifindex = 3 NVI0: Ifindex = 4 FastEthernet0/0: Ifindex = 1 FastEthernet0/0.3: Ifindex = 9. snmp ifmib ifindex persist To determine your current settings, run the following command on your router or switch: show snmp mib ifmib ifindex -or- show interface snmp-ifindex If necessary, change the settings of particular interfaces with the ifindex persist command. 2010.07.25 . They have had a command for a number of years to fix this behavior: snmp-server ifindex persist or snmp ifmib ifindex persist Perhaps Juniper has something similar? 24. show snmp mib ifmib ifindex. c3825, tunnel20, tunnel10 . The SNMP ifIndex persistence feature provides permanent ifIndex values, which eliminates the need to poll interfaces. snmp ifmib ifindex persist gender reveal description . show snmp mib ifmib ifindex. net-snmp does not provide any special facility to provide this functionality. A network engineer must implement SNMPv2 with these parameters: Enable SNMP community string c1sc0 with read-only permissions. snmp ifmib ifalias long snmp ifmib ifindex persist ! I know that reload is one possible reason. When there is a software upgrade, the device tries to keep the ifIndex persistent on a best effort basis.

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