Hi,
we use netdisco
Last week I noticed many strange MAC addresses popping up on some switch ports. Sometimes there are several hundreds, sometimes less than 10 of these MACs. This happens on differnt Cisco switches (C2950-I6Q4L2-M, WS-C6506).
10:77:77:78:37:75 12:48:75:da:d8:87 14:78:7c:87:c7:74 14:78:7c:87:c7:7c 14:78:7c:8a:87:74 14:78:fc:88:57:7c 14:78:fc:88:c7:74 14:78:fc:88:c7:7c 14:78:fc:98:c7:74 14:78:fc:98:c7:7c 14:78:fd:97:c7:7c 14:78:fd:a2:47:7c 14:78:fd:a7:77:7c 14:78:fd:b7:47:74 ....fc:98:c7:7c:26:77 fc:98:c7:7c:76:77 fc:98:c7:7c:76:b7 fe:11:77:c3:dc:87 fe:71:79:c3:8c:87
24:00:00:00:00:00 24:00:00:00:00:18 46:45:42:43:41:43 48:43:41:43:41:43 4a:65:74:20:38:39 4e:7d:35:3c:00:00 54:d4:35:3c:00:00 6a:00:00:d9:00:00 6a:00:00:d9:35:7c 6c:26:35:3c:18:e8 8a:77:35:3c:18:e818:77:a7:7c:a7:00
2a:f1:d7:7c:aa:71 2a:f1:d7:7c:aa:c1 2c:e7:bb:67:f7:27 42:7f:a5:1f:75:7f 54:77:77:77:75:47 54:87:b7:77:79:77 70:a7:74:75:48:73 70:a7:74:79:48:73 70:a7:77:79:48:73 70:a7:77:7d:48:73 70:b7:74:74:48:73 70:b7:74:79:48:73 70:d6:59:66:5a:07 72:77:07:27:70:57 74:77:79:77:71:70 74:b4:07:b3:64:74 74:ec:7b:0c:77:78 78:7c:74:9d:77:c7 7a:f7:7c:87:0b:71 7e:77:47:57:37:4f 80:d0:59:66:5a:07 98:d7:d7:92:77:8d b2:ea:b3:77:d4:75There is no vendor code which would match these addresses.
Has anyone seen this before? Any idea what might cause this?
Ralf