08-02-2011 10:56 AM - edited 03-07-2019 01:30 AM
HI, Normally I'm getting total mac address space available by typing command: "show mac-address-table count" but I need to get this information through SNMP protocol. Could someone please send me an OID for this or show where to find MIBS for this cisco. best regards Piotr Polok
Solved! Go to Solution.
08-05-2011 05:16 PM
Find out the number of VLANs on the switch by:
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public 192.168.0.251 vtpVlanState 2>/dev/null
CISCO-VTP-MIB::vtpVlanState.1.1 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.20 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.30 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.40 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.70 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1002 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1003 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1004 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1005 = INTEGER: operational(1)
Foreach Vlan execute snmpwalk on the oid to find out the number of macs on the vlan.
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public 192.168.0.251 dot1dTpFdbAddress 2>/dev/null | perl -lne 'END { print $. }'
21
Twenty-one mac entries are on vlan 1 (default vlan).
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2>/dev/null | perl -lne 'END { print $. }'
1
One mac entry is on vlan 20.
ect....
HTH,
Dan
08-09-2011 06:12 AM
Piotr Polok wrote:
HI, Thank you for the answers.
This command:
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
Following solution works but takes a long time: snmpwalk -v 2c -c public 192.168.200.200 .1.3.6.1.2.1.17.4.3.1.1 |wc -l
I do not have an access to this: Using SNMP
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress) http://www.cisco.com/en/US/customer/tech/tk648/tk362/technologies_tech_note09186a0080094a9b.shtml
The Cisco EEM script: http://forums.cisco.com/eforum/servlet/EEM;jsessionid=5CD9466C02021001E06F256E55777159.SJ2A?page=eem&fn=script&scriptId=1741 looks to be great solution, but I have no idea how to use it. Could you please help me
br Piotr Polok
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
OID for this is not going to be present since vlan20 is not on your switch.
try using it for vlan 1:
samson:~# snmpwalk -v 2c -c public
08-09-2011 08:27 AM
The BRIDGE-MIB is supported on this platform. I believe you have an issue on your snmp client with how the mib files are complled.
Try asking for this oid using the numberic number (not compiling the mib files).
[dafrey@HammerHead bin]$ snmptranslate -On BRIDGE-MIB::dot1dTpFdbAddress
.1.3.6.1.2.1.17.4.3.1.1
Execute:
snmpwalk -v 2c -c public 192.168.200.200 .1.3.6.1.2.1.17.4.3.1.1
Example:
User root does not know what path to compile the mib when asking for the textual oid:
[root@HammerHead bin]# snmpwalk -v 2c -c public 192.168.0.251 dot1dTpFdbAddress
dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
[root@HammerHead bin]#
User root asking for the oid in numberic form is successful:
[root@HammerHead bin]# snmpwalk -v 2c -c public 192.168.0.251 .1.3.6.1.2.1.17.4.3.1.1
SNMPv2-SMI::mib-2.17.4.3.1.1.0.1.108.20.253.193 = Hex-STRING: 00 01 6C 14 FD C1
SNMPv2-SMI::mib-2.17.4.3.1.1.0.3.186.11.152.144 = Hex-STRING: 00 03 BA 0B 98 90
SNMPv2-SMI::mib-2.17.4.3.1.1.0.12.241.234.183.60 = Hex-STRING: 00 0C F1 EA B7 3C
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.141 = Hex-STRING: 00 0D ED 87 2D 8D
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.142 = Hex-STRING: 00 0D ED 87 2D 8E
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.143 = Hex-STRING: 00 0D ED 87 2D 8F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.141 = Hex-STRING: 00 0D ED C2 AA 8D
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.142 = Hex-STRING: 00 0D ED C2 AA 8E
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.143 = Hex-STRING: 00 0D ED C2 AA 8F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.146 = Hex-STRING: 00 0D ED C2 AA 92
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.15 = Hex-STRING: 00 1B D5 1A 67 0F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.16 = Hex-STRING: 00 1B D5 1A 67 10
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.17 = Hex-STRING: 00 1B D5 1A 67 11
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.64 = Hex-STRING: 00 1B D5 1A 67 40
SNMPv2-SMI::mib-2.17.4.3.1.1.0.35.51.130.11.48 = Hex-STRING: 00 23 33 82 0B 30
SNMPv2-SMI::mib-2.17.4.3.1.1.0.35.51.130.11.57 = Hex-STRING: 00 23 33 82 0B 39
SNMPv2-SMI::mib-2.17.4.3.1.1.0.36.20.172.15.136 = Hex-STRING: 00 24 14 AC 0F 88
SNMPv2-SMI::mib-2.17.4.3.1.1.0.36.151.251.1.54 = Hex-STRING: 00 24 97 FB 01 36
SNMPv2-SMI::mib-2.17.4.3.1.1.110.0.0.0.132.50 = Hex-STRING: 6E 00 00 00 84 32
SNMPv2-SMI::mib-2.17.4.3.1.1.110.0.0.0.134.0 = Hex-STRING: 6E 00 00 00 86 00
08-05-2011 05:16 PM
Find out the number of VLANs on the switch by:
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public 192.168.0.251 vtpVlanState 2>/dev/null
CISCO-VTP-MIB::vtpVlanState.1.1 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.20 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.30 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.40 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.70 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1002 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1003 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1004 = INTEGER: operational(1)
CISCO-VTP-MIB::vtpVlanState.1.1005 = INTEGER: operational(1)
Foreach Vlan execute snmpwalk on the oid to find out the number of macs on the vlan.
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public 192.168.0.251 dot1dTpFdbAddress 2>/dev/null | perl -lne 'END { print $. }'
21
Twenty-one mac entries are on vlan 1 (default vlan).
[dafrey@HammerHead ~]$ snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2>/dev/null | perl -lne 'END { print $. }'
1
One mac entry is on vlan 20.
ect....
HTH,
Dan
08-06-2011 02:28 AM
Hello Piotr,
There is no specific OID that aggregates the count across the entire switch as to the
number of MAC addresses learned by the device. Only the CLI command offers this specific
information. Not every CLI command permutation offers as corresponding SNMP equivalent.
Specifically, you can use the following MIB/OID(s) to get the information in a multistep
process as the following context is VLAN aware.
.1.3.6.1.2.1.17.4
+--dot1dTpFdbTable(3) detail
|
+--dot1dTpFdbEntry(1) detail
| |
| +-- -R-- String dot1dTpFdbAddress(1)
| | Textual Convention: MacAddress
| | Size: 6
| +-- -R-- Integer dot1dTpFdbPort(2)
| +-- -R-- EnumVal dot1dTpFdbStatus(3)
| | Values: other(1), invalid(2), learned(3), self(4), mgmt(5)
Ideally, one would do and SNMPWALK of dot1dTpFdbStatus or dot1dTpFdbAddress for the
specific VLAN of choice. The default VLAN is 1. Then piping this information to the WC
(word count) command:
Linux / Unix wc command
About wc
Short for word count, wc displays a count of lines, words, and characters in a file.
Syntax:
wc [-c | -m | -C ] [-l] [-w] [ file ... ]
-c Count bytes.
-m Count characters.
-C Same as -m.
-l Count lines.
-w Count words delimited by white space characters or new line characters. Delimiting
characters are Extended Unix Code (EUC) characters from any code set defined by iswspace()
file Name of file to word count.
I found a Windows Equivalent through a Google search.
Please take into account that Cisco uses community string indexing to separate information
on a per vlan basis. I have include the links about this below.
Reference
-------------
How to Get Dynamic CAM Entries (CAM Table) for Catalyst Switches Using SNMP
http://www.cisco.com/en/US/partner/tech/tk648/tk362/technologies_tech_note09186a0080094a9b.shtml
SNMP Community String Indexing
http://www.cisco.com/en/US/partner/tech/tk648/tk362/technologies_tech_note09186a00801576ff.shtml
Using SNMP
http://www.cisco.com/en/US/customer/tech/tk648/tk362/technologies_tech_note09186a0080094a9b.shtml
Other than what has been provided, only the CLI would give you what you want. Note that
the BRIDGE-MIB is not a Cisco specific mib.
CLI command to look at would give the number of Dynamic (learned) addresses: Show
mac-address-table dynamic: To display dynamic MAC address table entries only, use the show
mac-address-table dynamic command in privileged EXEC mode.
however, As an alternative, you can go for the Cisco EEM script,
The above link would satisfy your needs
Thanks,
Ricky Micky
Please rate if this answer was useful
08-08-2011 10:28 PM
HI, Thank you for the answers.
This command:
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
Following solution works but takes a long time: snmpwalk -v 2c -c public 192.168.200.200 .1.3.6.1.2.1.17.4.3.1.1 |wc -l
I do not have an access to this: Using SNMP
http://www.cisco.com/en/US/customer/tech/tk648/tk362/technologies_tech_note09186a0080094a9b.shtml
The Cisco EEM script: http://forums.cisco.com/eforum/servlet/EEM;jsessionid=5CD9466C02021001E06F256E55777159.SJ2A?page=eem&fn=script&scriptId=1741 looks to be great solution, but I have no idea how to use it. Could you please help me
br Piotr Polok
08-09-2011 05:49 AM
What Vlans are currently configured on the switch?
08-09-2011 06:01 AM
Switch#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4, Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9, Fa0/10, Fa0/11, Fa0/12, Fa0/13, Fa0/14, Fa0/15, Fa0/16, Fa0/17, Fa0/18, Fa0/19, Fa0/21, Fa0/22, Fa0/23, Fa0/24, Gi0/2
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
08-09-2011 06:12 AM
Piotr Polok wrote:
HI, Thank you for the answers.
This command:
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
Following solution works but takes a long time: snmpwalk -v 2c -c public 192.168.200.200 .1.3.6.1.2.1.17.4.3.1.1 |wc -l
I do not have an access to this: Using SNMP
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress) http://www.cisco.com/en/US/customer/tech/tk648/tk362/technologies_tech_note09186a0080094a9b.shtml
The Cisco EEM script: http://forums.cisco.com/eforum/servlet/EEM;jsessionid=5CD9466C02021001E06F256E55777159.SJ2A?page=eem&fn=script&scriptId=1741 looks to be great solution, but I have no idea how to use it. Could you please help me
br Piotr Polok
samson:~# snmpwalk -v 2c -c public@20 192.168.0.251 dot1dTpFdbAddress 2
giving me an error: dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
OID for this is not going to be present since vlan20 is not on your switch.
try using it for vlan 1:
samson:~# snmpwalk -v 2c -c public
08-09-2011 06:16 AM
HI, it's the same...
samson:~# snmpwalk -v 2c -c public 192.168.200.200 dot1dTpFdbAddress
dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
08-09-2011 08:27 AM
The BRIDGE-MIB is supported on this platform. I believe you have an issue on your snmp client with how the mib files are complled.
Try asking for this oid using the numberic number (not compiling the mib files).
[dafrey@HammerHead bin]$ snmptranslate -On BRIDGE-MIB::dot1dTpFdbAddress
.1.3.6.1.2.1.17.4.3.1.1
Execute:
snmpwalk -v 2c -c public 192.168.200.200 .1.3.6.1.2.1.17.4.3.1.1
Example:
User root does not know what path to compile the mib when asking for the textual oid:
[root@HammerHead bin]# snmpwalk -v 2c -c public 192.168.0.251 dot1dTpFdbAddress
dot1dTpFdbAddress: Unknown Object Identifier (Sub-id not found: (top) -> dot1dTpFdbAddress)
[root@HammerHead bin]#
User root asking for the oid in numberic form is successful:
[root@HammerHead bin]# snmpwalk -v 2c -c public 192.168.0.251 .1.3.6.1.2.1.17.4.3.1.1
SNMPv2-SMI::mib-2.17.4.3.1.1.0.1.108.20.253.193 = Hex-STRING: 00 01 6C 14 FD C1
SNMPv2-SMI::mib-2.17.4.3.1.1.0.3.186.11.152.144 = Hex-STRING: 00 03 BA 0B 98 90
SNMPv2-SMI::mib-2.17.4.3.1.1.0.12.241.234.183.60 = Hex-STRING: 00 0C F1 EA B7 3C
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.141 = Hex-STRING: 00 0D ED 87 2D 8D
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.142 = Hex-STRING: 00 0D ED 87 2D 8E
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.135.45.143 = Hex-STRING: 00 0D ED 87 2D 8F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.141 = Hex-STRING: 00 0D ED C2 AA 8D
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.142 = Hex-STRING: 00 0D ED C2 AA 8E
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.143 = Hex-STRING: 00 0D ED C2 AA 8F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.13.237.194.170.146 = Hex-STRING: 00 0D ED C2 AA 92
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.15 = Hex-STRING: 00 1B D5 1A 67 0F
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.16 = Hex-STRING: 00 1B D5 1A 67 10
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.17 = Hex-STRING: 00 1B D5 1A 67 11
SNMPv2-SMI::mib-2.17.4.3.1.1.0.27.213.26.103.64 = Hex-STRING: 00 1B D5 1A 67 40
SNMPv2-SMI::mib-2.17.4.3.1.1.0.35.51.130.11.48 = Hex-STRING: 00 23 33 82 0B 30
SNMPv2-SMI::mib-2.17.4.3.1.1.0.35.51.130.11.57 = Hex-STRING: 00 23 33 82 0B 39
SNMPv2-SMI::mib-2.17.4.3.1.1.0.36.20.172.15.136 = Hex-STRING: 00 24 14 AC 0F 88
SNMPv2-SMI::mib-2.17.4.3.1.1.0.36.151.251.1.54 = Hex-STRING: 00 24 97 FB 01 36
SNMPv2-SMI::mib-2.17.4.3.1.1.110.0.0.0.132.50 = Hex-STRING: 6E 00 00 00 84 32
SNMPv2-SMI::mib-2.17.4.3.1.1.110.0.0.0.134.0 = Hex-STRING: 6E 00 00 00 86 00
09-11-2011 02:05 AM
HI,
Thank, this is very helpful.
best regards
Piotr Polak
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