2950 LACP interesing question

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  mikej412 Member Posts: 10,086 ■■■■■■■■■■

  April 2008

  It may have gotten the PAgP and LACP capability in 12.1(6) -- but the Feature Navigator is always the best place to check to be sure.
  
  I think prior to that it could respond to PAgP requests, but not initiate..... but I'm not sure if that was just the LRE versions.

  :mike: Cisco Certifications -- Collect the Entire Set!

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  Chris Knight Member Posts: 66 ■■□□□□□□□□

  April 2008

  Thanks

  "Self-realization. I was thinking of the immortal words of Socrates, when he said, "I drank what?"
  Chris Knight
  Real Genius

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  tech-airman Member Posts: 953

  April 2008

  Chris Knight,
  

  Chris Knight wrote:

  I am reading the BCMSN cisco press book and it states that 2950 switches are not capable of running pagp AND lacp.

  
  That is correct. Just like ISL is Cisco Proprietary and 802.1q is vendor neutral, PAgP is Cisco Proprietary and LACP is vendor neutral.
  

  Chris Knight wrote:

  Here is the output from my switch:
  Switch2#sh ver
  Cisco Internetwork Operating System Software
  IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(14)EA1a, RELEASE SOFTWARE (fc1)
  Copyright (c) 1986-2003 by cisco Systems, Inc.
  Compiled Tue 02-Sep-03 03:33 by antonino
  Image text-base: 0x80010000, data-base: 0x805C0000
  
  ROM: Bootstrap program is CALHOUN boot loader
  
  Switch2 uptime is 1 week, 5 hours, 3 minutes
  System returned to ROM by power-on
  System image file is "flash:/c2950-i6q4l2-mz.121-14.EA1a.bin"
  
  cisco WS-C2950-24 (RC32300) processor (revision B0) with 20710K bytes of memory.
  Processor board ID FAB0551Q06Q
  Last reset from system-reset
  Running Standard Image
  24 FastEthernet/IEEE 802.3 interface(s)
  
  32K bytes of flash-simulated non-volatile configuration memory.
  Base ethernet MAC Address: 00:08:7C:80:5A:40
  Motherboard assembly number: 73-5781-08
  Motherboard serial number: FAB05507FUM
  
  Here is my channel-protocol output:
  Switch2#
  Switch2#conf t
  Enter configuration commands, one per line. End with CNTL/Z.
  Switch2(config)#int fa 0/2
  Switch2(config-if)#spa
  Switch2(config-if)#channe
  Switch2(config-if)#channel-pr
  Switch2(config-if)#channel-protocol ?
  lacp Prepare interface for LACP protocol
  pagp Prepare interface for PAgP protocol
  
  Switch2(config-if)#channel-protocol
  Switch2#
  
  Does anyone know why both are showing up as an option? Is it due to the revision in my IOS version?

  
  What the book is saying is that over a single link, the above configuration is for lacp OR pagp on the interface fastethernet 0/2 and NOT lacp AND pagp. In other words, it's an either/or NOT both AT THE SAME TIME.
  
  I hope this helps.

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