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"show mac-address-table" and dot1dTpFdbAddress are different

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tnatsukawa
Level 1
Level 1

‎01-25-2003 11:20 PM - edited ‎03-02-2019 04:32 AM

Hi, I'm snmpwalk'ing dot1dTpFdbAddress on my Catalyst 3524 to retrieve its MAC address table, but it doesn't seem to give me all MAC addresses... Some MAC addresses, that I can see when I do "show mac-address-table", are missing from the output of snmpwalk. Please help. Tatsuo

I'll try and demonstrate the problem here. Below, "show mac-address-table" gives me the following two MAC addresses on FastEthernet0/8:

0006.296f.77c4 Dynamic 103 FastEthernet0/8

0006.298f.2e6b Dynamic 103 FastEthernet0/8

However, I can't find these MAC addresses when I do the snmpwalk (below).

MY_CAT3524>sh mac-address-table

Dynamic Address Count: 39

Secure Address Count: 0

Static Address (User-defined) Count: 0

System Self Address Count: 52

Total MAC addresses: 91

Maximum MAC addresses: 8192

Non-static Address Table:

Destination Address Address Type VLAN Destination Port

------------------- ------------ ---- --------------------

0000.0c07.ac00 Dynamic 102 GigabitEthernet0/1

0000.0c07.ac00 Dynamic 103 GigabitEthernet0/1

0000.0c07.ac00 Dynamic 117 GigabitEthernet0/1

0000.0c07.ac00 Dynamic 120 GigabitEthernet0/1

0000.0c07.ac65 Dynamic 1 GigabitEthernet0/1

0000.0c07.ac79 Dynamic 1 GigabitEthernet0/1

0000.0c07.ac7a Dynamic 1 GigabitEthernet0/1

0000.0c07.ac83 Dynamic 1 GigabitEthernet0/1

0000.0c07.accb Dynamic 203 GigabitEthernet0/2

0001.63f0.e920 Dynamic 1 GigabitEthernet0/1

0001.c9b0.27a8 Dynamic 102 GigabitEthernet0/1

0001.c9b0.27a8 Dynamic 103 GigabitEthernet0/1

0001.c9b0.27a8 Dynamic 120 GigabitEthernet0/1

0001.c9b0.27a8 Dynamic 203 GigabitEthernet0/2

0001.c9b0.30ac Dynamic 1 GigabitEthernet0/1

0001.c9b0.30ac Dynamic 102 GigabitEthernet0/1

0001.c9b0.30ac Dynamic 103 GigabitEthernet0/1

0001.c9b0.30ac Dynamic 117 GigabitEthernet0/1

0001.c9b0.30ac Dynamic 120 GigabitEthernet0/1

0001.c9b0.30ac Dynamic 203 GigabitEthernet0/2

0002.7e23.e276 Dynamic 1 GigabitEthernet0/1

0002.7e23.e276 Dynamic 102 GigabitEthernet0/1

0002.7e23.e276 Dynamic 103 GigabitEthernet0/1

0002.7e23.e276 Dynamic 117 GigabitEthernet0/1

0002.7e23.e276 Dynamic 120 GigabitEthernet0/1

0006.296f.77c4 Dynamic 103 FastEthernet0/8

0006.296f.8c6a Dynamic 103 GigabitEthernet0/1

0006.298f.2e6b Dynamic 103 FastEthernet0/8

0006.298f.31b3 Dynamic 117 FastEthernet0/13

0006.29af.9156 Dynamic 117 GigabitEthernet0/1

0006.29d5.1c68 Dynamic 120 FastEthernet0/21

0006.29d5.2869 Dynamic 103 FastEthernet0/11

0006.29de.6f8b Dynamic 102 GigabitEthernet0/1

0006.29de.8cd5 Dynamic 203 FastEthernet0/5

0006.29de.8d33 Dynamic 102 FastEthernet0/3

0006.29de.8db7 Dynamic 1 GigabitEthernet0/1

0006.29de.8e13 Dynamic 102 FastEthernet0/1

0010.a4af.d93e Dynamic 1 GigabitEthernet0/1

0030.b63f.3cfa Dynamic 203 GigabitEthernet0/2

$ snmpwalk -c foo -On 210.57.170.42 .1.3.6.1.2.1.17.4.3.1.1

.1.3.6.1.2.1.17.4.3.1.1.0.0.12.7.172.101 = Hex: 00 00 0C 07 AC 65

.1.3.6.1.2.1.17.4.3.1.1.0.0.12.7.172.121 = Hex: 00 00 0C 07 AC 79

.1.3.6.1.2.1.17.4.3.1.1.0.0.12.7.172.122 = Hex: 00 00 0C 07 AC 7A

.1.3.6.1.2.1.17.4.3.1.1.0.0.12.7.172.131 = Hex: 00 00 0C 07 AC 83

.1.3.6.1.2.1.17.4.3.1.1.0.1.99.240.233.32 = Hex: 00 01 63 F0 E9 20

.1.3.6.1.2.1.17.4.3.1.1.0.1.201.176.48.172 = Hex: 00 01 C9 B0 30 AC

.1.3.6.1.2.1.17.4.3.1.1.0.2.126.35.226.118 = Hex: 00 02 7E 23 E2 76

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.64 = Hex: 00 04 9A 9A EC 40

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.65 = Hex: 00 04 9A 9A EC 41

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.66 = Hex: 00 04 9A 9A EC 42

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.67 = Hex: 00 04 9A 9A EC 43

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.68 = Hex: 00 04 9A 9A EC 44

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.69 = Hex: 00 04 9A 9A EC 45

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.70 = Hex: 00 04 9A 9A EC 46

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.71 = Hex: 00 04 9A 9A EC 47

p.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.72 = Hex: 00 04 9A 9A EC 48

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.73 = Hex: 00 04 9A 9A EC 49

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.74 = Hex: 00 04 9A 9A EC 4A

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.75 = Hex: 00 04 9A 9A EC 4B

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.76 = Hex: 00 04 9A 9A EC 4C

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.77 = Hex: 00 04 9A 9A EC 4D

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.78 = Hex: 00 04 9A 9A EC 4E

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.79 = Hex: 00 04 9A 9A EC 4F

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.80 = Hex: 00 04 9A 9A EC 50

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.81 = Hex: 00 04 9A 9A EC 51

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.82 = Hex: 00 04 9A 9A EC 52

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.83 = Hex: 00 04 9A 9A EC 53

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.84 = Hex: 00 04 9A 9A EC 54

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.85 = Hex: 00 04 9A 9A EC 55

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.86 = Hex: 00 04 9A 9A EC 56

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.87 = Hex: 00 04 9A 9A EC 57

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.88 = Hex: 00 04 9A 9A EC 58

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.89 = Hex: 00 04 9A 9A EC 59

.1.3.6.1.2.1.17.4.3.1.1.0.4.154.154.236.90 = Hex: 00 04 9A 9A EC 5A

.1.3.6.1.2.1.17.4.3.1.1.0.6.41.222.141.183 = Hex: 00 06 29 DE 8D B7

.1.3.6.1.2.1.17.4.3.1.1.0.16.164.175.217.62 = Hex: 00 10 A4 AF D9 3E

END

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vergeerf
Level 1
Level 1

‎01-27-2003 06:37 AM

Hi, keep in mind that your snmp-query only retreives the vlan1 members, If you want for e.g. retreive vlan2 members use public@2 for community name.

Are the ports in a different vlan?

View solution in original post

5 Replies 5

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vergeerf
Level 1
Level 1

‎01-27-2003 06:37 AM

Hi, keep in mind that your snmp-query only retreives the vlan1 members, If you want for e.g. retreive vlan2 members use public@2 for community name.

Are the ports in a different vlan?

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tnatsukawa
Level 1
Level 1
In response to vergeerf

‎01-27-2003 07:26 PM

vergeerf, thanks. It works! I didn't know this community@vlan trick... Tatsuo

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elsie.leung
Level 1
Level 1
In response to tnatsukawa

‎02-05-2003 12:40 PM

Hi, May I ask for the exact syntax for this. I am trying to write a script to list out MAC address of user ports from a switch. Thanks in advance.

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JRoos
Level 1
Level 1
In response to vergeerf

‎03-21-2025 01:27 AM

vergeerf, you are a legend. 
I've been losing my mind about this exact issue for 2 weeks now. Until i found your answer. Thank you sooooo much!!

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