Can't clear mac address table from interface
hello all.
I'm facing a problem, and i've also tried to workaround but not sucessfully.
I've got a polycom phone on the swich. When I connect a laptop on that port, the mac address is learned by the switch and keep the mac address even if I disconnect the ethernet cable from that port and if I try to connect the same laptop on other port on the same switch I've got errdisable error in the last connected port. Although I was figuring out what's wrong and seems that the mac address is kept for some reason in the first port.
sw02#show mac address-table interface f0/19
Mac Address Table
Vlan Mac Address Type Ports
60 3c07.5417.9069 STATIC Fa0/19
80 0004.f21e.afa7 STATIC Fa0/19
this is a 2960, Version 12.2(44r)SE4
with a Polycom SoundPoint IP 330 connected on vlan 80
I was searching to clear the mac address table on that interface but the IOS version didn't give me the static option
sw02#clear mac address-table ?
dynamic dynamic entry type
move move keyword
notification Clear MAC notification Global Counters
As there's no dynamic entries on that interface the mac addresses remain on the f0/19 interface.
I've tried with other switches and with other laptops and is the same errdisable status.
sw02#show run int f0/19
interface FastEthernet0/19
description VoIP
switchport access vlan 60
switchport mode access
switchport nonegotiate
switchport voice vlan 80
switchport port-security maximum 5
switchport port-security
no snmp trap link-status
ip dhcp snooping limit rate 100
end
any thought?
the mac addresses are not manually configured.
yes, that's my point. when I disconnect the ethernet cable the mac addresses are not flushed from the mac table.
Although I don't understand why the mac addresses are kept in the interface, if I force the interface aging time to 1 min, the problem don't occur anymore.
I was reviewing the switch config and I've got ports with aging time 0 (that learn and flush the mac addresses dynamically) and I've got ports with aging time 1 (that learn and flush the mac addresses at the end of 60 seconds)
The problem is solved although I need to investigate this issue in other switch models and with other voip phones.
Tks Jon and Julio
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Hi All
I did not type the following command. Why does it appear when I show run ? Which command can cause the issue? Thank you
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What am i missing?
pixfirewall# show mac-address-table
^
ERROR: % Invalid input detected at '^' marker.
[EDIT: karat is under the A in mac ]
pixfirewall# sh ver
Cisco PIX Security Appliance Software Version 8.0(4)
Device Manager Version 6.1(3)
Compiled on Thu 07-Aug-08 19:42 by builders
System image file is "flash:/image.bin"
Config file at boot was "startup-config"
pixfirewall up 175 days 11 hours
Hardware: PIX-525, 256 MB RAM, CPU Pentium III 600 MHz
Flash E28F128J3 @ 0xfff00000, 16MB
BIOS Flash AM29F400B @ 0xfffd8000, 32KB
0: Ext: Ethernet0 : address is 000d.28f9.62a5, irq 10
1: Ext: Ethernet1 : address is 000d.28f9.62a6, irq 11
2: Ext: Ethernet2 : address is 000d.8810.a620, irq 11
3: Ext: Ethernet3 : address is 000d.8810.a621, irq 10
4: Ext: Ethernet4 : address is 000d.8810.a622, irq 9
5: Ext: Ethernet5 : address is 000d.8810.a623, irq 5
Licensed features for this platform:
Maximum Physical Interfaces : 6
Maximum VLANs : 25
Inside Hosts : Unlimited
Failover : Disabled
VPN-DES : Enabled
VPN-3DES-AES : Enabled
Cut-through Proxy : Enabled
Guards : Enabled
URL Filtering : Enabled
Security Contexts : 0
GTP/GPRS : Disabled
VPN Peers : Unlimited
This platform has a Restricted (R) license.
Serial Number: 807234146
Running Activation Key: 0x6ab205ba 0x986d4239 0xf56523af 0x76f3d58b
Configuration last modified by enable_15 at 12:58:08.130 EDT Thu May 16 2013
pixfirewall# show mac-address-table
^
ERROR: % Invalid input detected at '^' marker.Hi,
Command Modes The following table shows the modes in which you can enter the command:
Command Mode
Firewall Mode
Security Context
Routed
Transparent
Single
Multiple
Context
System
Privileged EXEC
Source:
http://www.cisco.com/en/US/docs/security/asa/asa80/command/reference/s4.html#wp1448364
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Hello,
In one of our core switches, the output of the mac-address-table shows some mac addresses which come up as MPLS Multicast address when I looked them up under MAC Manufacturer(See below). Also, in the mac-address-table under the port column, those mac addresses display several ports associated with them and the word Router(see attachement). My question is, why are these MAC addresses come up as MPLS Multicast and why under the ports is it has the word Router?
Thanks in advance...
Prefix
Vendor
01005E
Internet Multicast (01:00:5E:00:00:00 to 01:00:5E:7F:FF:FF)
01005E
MPLS Multicast (01:00:5E:80:00:00 to 01:00:5E:8F:FF:FF)
01005E
Internet reserved by IANA (01:00:5E:90:00:00 to 01:00:5E:FF:FF:FF)
01005E
Internet reserved by IANA (01:00:5E:90:00:00 to 01:00:5E:FF:FF:FF)
01005E
MPLS Multicast (01:00:5E:80:00:00 to 01:00:5E:8F:FF:FF)
01005E
Internet Multicast (01:00:5E:00:00:00 to 01:00:5E:7F:FF:FF)Hi,
Yes multiple MAC addresses are supported on each port. The switch learns the MAC by noting the source address of the packet received on each port and on that basis it builds what we call MAC address table. There is an aging mechanism in place which removes the inactive MAC addresses and allows new ones to be learned as devices are connected and disconnected.
The default aging time is 300 seconds, however if need arises you can change the same by giving the command - 'mac address-table aging time number vlan vlan-id'.
Have a look at the following link-->
http://www.cisco.com/en/US/products/hw/switches/ps5213/products_configuration_guide_chapter09186a00801cdf85.html#wp1063713
Hope this helps!
Regards,
AbhisheK
Please rate all helpful posts!!! -
Dears
Would like your assistance please regarding command "mac-address-table synchronize"
My understanding is that it syncs CAM table between different DFCs & RSP PFC
So If we are having only one DFC there would be no need for this command. It will only be useful in case we are having several DFCs or there is a communication between DFC and ports connected in RSP.
1- Correct ?
2- Is SVI interface considered to be part of DFC or PFC ?
I am asking this cause if part of PFC then this command would be needed
Many Thanks
Regards
Sherif IsmailSherifismail,
I see that its already been answered anyway again:
My understanding is that it syncs CAM table between different DFCs & RSP PFC
==Answer is yes.
So If we are having only one DFC there would be no need for this command. It will only be useful in case we are having several DFCs or there is a communication between DFC and ports connected in RSP.
1- Correct ?
Answer: No you still required. else sometime you might see the mac address present in the software and not on the module.
2- Is SVI interface considered to be part of DFC or PFC ?
I am asking this cause if part of PFC then this command would be needed
Answer: I would believe it would be part of PFC.
HTH
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