如何使用 SNMP OID 輪詢 ARP 表？

當您需要輪詢設備的 ARP 表時，傳統的做法是使用ipNetToMediaPhysAddressor atPhysAddress；但是，根據 Cisco 的文件，這兩個 OID 都已被棄用。

這些 OID 工作得很好；但是，我正在建構一個新工具，因此如果可能的話，使用最新的 OID 是有意義的。

是否有未棄用的 SNMP OID 來查詢設備中的 ARP 表？到目前為止，Google還沒有為我找到這個答案……

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Mircea 的答案在較新的 IOS 上執行良好……

[mpenning@something]$ snmpbulkwalk -v 2c -c public -Osq 192.0.2.1 ipNetToPhysicalPhysAddress
ipNetToPhysicalPhysAddress.2.ipv4."192.0.2.1" a4:4c:11:90:56:80
ipNetToPhysicalPhysAddress.2.ipv4."192.0.2.2" a4:4c:11:96:68:0
ipNetToPhysicalPhysAddress.2.ipv4."192.0.2.101" 0:90:b:43:80:74
[mpenning@something]$ snmpbulkwalk -v 2c -c public -Oqv 192.0.2.1 sysDescr
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.2(2)T1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Wed 29-Feb-12 23:44 by prod_rel_team
[mpenning@something]$

較舊的 IOS 需要使用ipNetToMediaPhysAddress

您應該按照RFC 4293ipNetToPhysicalTable的定義使用。所以變成ipNetToMediaPhysAddressipNetToPhysicalPhysAddress

ipNetToMediaTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpNetToMediaEntry
    MAX-ACCESS not-accessible
    STATUS     deprecated
    DESCRIPTION
           "The IPv4 Address Translation table used for mapping from
            IPv4 addresses to physical addresses.

            This table has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by the
            ipNetToPhysicalTable."
    ::= { ip 22 }

引用自：https://serverfault.com/questions/441072