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Archives for January 2014

Alternate Port Role Shows in STP

January 5, 2014 by Rowell Dionicio Leave a Comment

I have four physical switches I use for studying the CCNP SWITCH. While labbing spanning-tree protocol, I noticed an RSTP particular port role in IEEE spanning-tree mode. Note that this is not RSTP. My switches are running in 802.1D, STP.

DLS2#show spanning-tree

VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    24577
             Address     000d.bdd3.4e80
             Cost        19
             Port        2 (FastEthernet0/2)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     0011.bba6.b000
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/1               Altn BLK 19        128.1    P2p
Fa0/2               Root FWD 19        128.2    P2p
Fa0/47              Altn BLK 19        128.47   P2p
Fa0/48              Altn BLK 19        128.48   P2p

DLS2#sh run | i span
spanning-tree mode pvst
spanning-tree extend system-id

I have redundant links between my switches. I highlighted the text in bold. VLAN 1 is running IEEE STP and you can see F0/1, F0/47, and F0/48 in Altn port role. The switch command spanning-tree mode pvst is shown in the running-config.

The Alternate port role is actually found in RSTP, 802.1W, as you can see in this Cisco document.

I went out to the networking-forum to see if anyone else had this issue and was then lead to the Cisco Support forums.

[Read more…] about Alternate Port Role Shows in STP

Improving My Career in 2014

January 1, 2014 by Rowell Dionicio Leave a Comment

Setting goals. Image credit by Stephen Pratt
Setting goals. Image credit by Stephen Pratt

Sorry 2013 but I have to move on. Bye. Time to change my attitude and mindset in 2014.

Certifications have been on my mind. On and off. I attempted VMware’s VCA exam and passed. One step closer to my VCP which I plan on attempting in 2014.

Since August 2013 I was studying for the CCNP SWITCH, 642-813, exam. Unfortunately, I failed the day after Christmas. I learned that I need to apply the mindset of improving my skill set. Don’t focus on passing an exam. That will come naturally as my knowledge in switching improves.

Having an affinity towards network engineering I joined Cisco’s Champion program. It fits well with my career as I evangelize Cisco products.

On the blogosphere, I published 52 posts. My busiest day of the year was October 30th, 2013 with 684 views. My most popular post on that day was My Thoughts: Passing The VMware VCA-DCV Certification Exam with 123 comments.

Around summer I made it an objective to utilize my blog more and I did change up my theme to the Genesis Framework which is hosted on Eleven2. Other top posts include:

  • Installing Nagios 3.5 on CentOS 6.5 Minimal
  • Configuring NAT for a Public Server Using the Same Outside Interface
  • How To Upgrade the IOS of a Cisco Switch 
  • CCNA Security Lab Equipment 640-554

Moving into 2014 [Read more…] about Improving My Career in 2014

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