MAC Authentication Bypass on Catalyst 2950 supported?

cisco

    Sponsored Links

    Next

  • 1. Multiple crypto maps on a 3825 router interface
    Here's my problem. I used to have two routers connect via T1. To back up the T1, I had a tunnel running between the two routers on their Internet-facing ethernet ports. This worked fine; if the T1 went down, traffic automatically routed across the tunnel, and the two sites stayed connected. Recent I added a third site, with a T1 between it and my first site. I wanted to create a backup tunnel, just like I did before, but now I learn that the ethernet port on my first site's router can only be configured with a single tunnel (using the crypto map command). So apparently I can have only one tunnel assigned to this interface. What to do? Can I use subinterfaces on my first site's Internet- facing ethernet port? If I do that, that's really going to screw up my IP addressing scheme. Or is there a way to assign two crypto maps to a router's interface, and I just don't know what it is? Thanks.
  • 2. VLAN concept
    Hi I have a question about the VOIP VLAN. For typical conneciton, PC----VOIP----SW The VOIP is in voice vlan 2 and the PC is in data vlan 3. When the ping is sent from the PC to the VOIP phone, what is the path does it take? I expect that the ping will find the VLAN interface on the switch first. Then, the VLAN routing determine the exit outgoing port directed to the VOIP phone which is the same as the incoming switchport. Am I right? How to prove it? Thanks
  • 3. Control NAT translation through SNMP is possible??
    Hi, I am trying from various days to control the number of the transactions of nat through SNMP, but I do not succeed to find the correct OID to indicate. Practically I would want to be able to export in a diagram the information indicated under: Rotuer_one#sh ip nat statistics Total active translations: 5582 (4 static, 5578 dynamic; 5581 extended)<------------------- I would want to take these information, Total, static, dynamic end extended. . . Currently I collect all the information through a server linux with MRTG. Which OID I must indicate to MRTG for NAT information? Thanks for reaply. bye Phelton

MAC Authentication Bypass on Catalyst 2950 supported?

Postby Daniel Alex » Fri, 16 May 2008 12:41:13 GMT

Hi all,

Which IOS release that supports MAC Authentication Bypass (MAB) for Catalyst 
2950 switch? Currently I have 12.1-22 EA8a version and I would like to use 
this feature.

Thanks very much.

Regards,

Daniel 


Similar Threads:

1.Problems with Catalyst 2950 and Mac OS X 10.4 Systems

Hello,

since we have replaced our Catalyst 2924XL switches with Catalyst 2950 
we get more and more problems with Apple Macintosh OS X 10.4 Systems 
with G5 processors.
The systems get their static IP addresses from two SuSE Linux 
DHCP-Servers. In our campus-LAN 76 VLANs are configured.

Normally everything works well, but sometimes some Mac OS X 10.4 systems 
lose suddenly their server mounts.
Sometimes other Mac OS X 10.4 systems dont get an IP address while 
booting. After a reboot it works regularly.
Deactivating the port-security doesnt help.
"Spanningtree portfast" and "switchport nonegotiate" is configured on 
the switchport.

Has anyone a hint on this problem?
Thanks in advance!
Kai Matthies

----
Our configuration:

CatXX#sh vers
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA1b, RELEASE 
SOFTWARE (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Tue 24-Aug-04 00:12 by yenanh
Image text-base: 0x80010000, data-base: 0x8055C000

ROM: Bootstrap program is C2950 boot loader

Cat76 uptime is 47 weeks, 6 days, 7 hours, 32 minutes
System returned to ROM by power-on
System restarted at 15:05:25 MESZ Tue Jun 14 2005
System image file is "flash:/c2950-i6q4l2-mz.121-22.EA1b.bin"

cisco WS-C2950G-48-EI (RC32300) processor (revision Q0) with 20873K 
bytes of memory.
Processor board ID XXXXX
Last reset from system-reset
Running Enhanced Image
48 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: xx:xx:xx:xx:xx:xx
Motherboard assembly number: 73-7409-12
Power supply part number: 34-0965-01
Motherboard serial number: XXXXX
Power supply serial number: XXXXX
Model revision number: Q0
Motherboard revision number: A0
Model number: WS-C2950G-48-EI
System serial number: XXXXXX
Configuration register is 0xF

CatXX#sh run int fast 0/22
interface FastEthernet0/22
  description XXX
  switchport access vlan 721
  switchport mode access
  switchport nonegotiate
  switchport port-security
  switchport port-security mac-address sticky
  switchport port-security mac-address sticky 0000.1111.2222
  no snmp trap link-status
  no cdp enable
  spanning-tree portfast
end

CatXX#sh int fast 0/22
FastEthernet0/22 is down, line protocol is down (notconnect)
   Hardware is Fast Ethernet, address is 0013.1953.xxxx (bia 0013.1953.xxxx)
   Description: XXX
   MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
      reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation ARPA, loopback not set
   Keepalive set (10 sec)
   Auto-duplex, Auto-speed, media type is 100BaseTX
   input flow-control is unsupported output flow-control is unsupported
   ARP type: ARPA, ARP Timeout 04:00:00
   Last input 29w0d, output 01:18:10, output hang never
   Last clearing of "show interface" counters 3d12h
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
      276641 packets input, 102028305 bytes, 0 no buffer
      Received 1969 broadcasts (0 multicast)
      0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
      0 watchdog, 1189 multicast, 0 pause input
      0 input packets with dribble condition detected
      797521 packets output, 121800493 bytes, 0 underruns
      0 output errors, 0 collisions, 0 interface resets
      0 babbles, 0 late collision, 0 deferred
      0 lost carrier, 0 no carrier, 0 PAUSE output
      0 output buffer failures, 0 output buffers swapped out

CatXX#sh int fast 0/22 switchport
Name: Fa0/22
Switchport: Enabled
Administrative Mode: static access
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 721 (XXX)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none

2.anyone know about: vlan trunking with catalyst 1900 to any other ios device (catalyst 2950)

3.anyone know about: vlan trunking with catalyst 1900 to any other ios device (catalyst 2950)

4.Settinup 802.ix authentication with cisco 2950 and Micorsoft IAS

I have a project to stop rogue users form pluging onto my network. I
have seen where cisco switches can do port authentication with a radius
server. I would like to setup and IAS server on win2k3 as my radius
server. Can anyone provide me with configuration guides to configure
the switch as well as the IAS server? I would really appreciate the
assistance.

PWM

5.Debug mac access-list extended 2950

Is there a way to debug extended mac access-lists?  I have not found
anything on the Cisco Web Sit or in my switch doc.

My layer2 acl is blocking everything and I do not have any way of
seeing what is happening.  show access-list does not provide a count of
deny frames.  All the debug commands I looked at are for layer3&4
ACL's.

Any suggestions would be appreciated.

6. 2950 switch - max mac-add table size?

7. Port-security mac address on 2950

8. 2950 empty mac address table



Return to cisco

 

Who is online

Users browsing this forum: No registered users and 10 guest