IpNetToPhysicalPhysAddress.2.ipv4."192.0.2.101" snmpbulkwalk -v 2c -c public -Oqv 192.0.2.1 sysDescrĬisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.2(2)T1, RELEASE SOFTWARE (fc1)Ĭopyright (c) 1986-2012 by Cisco Systems, Inc. If you know the specific mac address, then you can use below command to check mac address entry for that address using show mac address-table address xxxx.xxxx. I want to know to which interface this host is connected to the cisco switch. First of all checking the mac address table by using show mac address-table. My book says that when the MAC address table becomes fully, the switch goes into fail-open mode and broadcasts ALL frames to all ports except the ingress port. IpNetToPhysicalPhysAddress.2.ipv4."192.0.2.2" a4:4c:11:96:68:0 To manage mac address table, we need to know a couple of commands in Cisco Catalyst switches. Would someone be able to clarify a point regarding MAC address table overflow attacks. snmpbulkwalk -v 2c -c public -Osq 192.0.2.1 ipNetToPhysicalPhysAddress Is there a non-deprecated SNMP OID to query for the ARP table in a device? Google hasn't turned this answer up for me, so far. Hi, is it possible the get the MAC address table on SG300 switches with SNMP I tried with OID 1.3.6.1.2.1.17.4.3.1. Symptom: MAC address learned at wrong VLAN as a result of residue after dynamic vlan assignment. These OIDs work just fine however, I'm building a new tool so it makes sense to use the most current OID, if possible. 21 1 1 gold badge 1 1 silver badge 2 2 bronze badges. from the MIB locator page: dot1dTpFdbEntry 'Information about a specific unicast MAC address for which the bridge has some forwarding and/or filtering information. Look: sh mac macdb sh macdb Software MAC database It must be another command, but I cant find it. depends on the platform/IOS, but normally you should be able to get the mac address table using object dot1dTpFdbEntry, OID 1.3.6.1.2.1.17.4.3.1 from the BRIDGE-MIB group.
Only the switch's mac address will show in snmp, not the host's mac address connected to switch. 1.3.6, still cannot use grep to see the host's mac address. Do you know which OID lists mac address table I tried to snmpbulkwalk on. When you need to poll the ARP table of a device, conventional wisdom is to use ipNetToMediaPhysAddress or atPhysAddress however, both of these OIDs are deprecated according to Cisco's documentation. This might seem silly but I cant find the MAC address table in my Cisco ASR1001. You are right, I have to look at mac address table, not the arp table.
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