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- About clifford.gormley
clifford.gormle
Beginner
CCNA, CCDA, CCNP, CCDP
MCSE
Certfified Nortel Router Expert
B.S. Industrial Technology
Minor in Computer Science
Biography from communities:
CCNA, CCDA, CCNP, CCDP, MCSE, Nortel Rotuer Expert (NNCSE)
B.S. Industrial Technology
Minor in Computer Science
AA in Electronics
Recent Badges
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Member since
10-15-2002
102
Posts
0
Helpful
1
Solution
Created by
clifford.gormle
in Switching
01-20-2015
07:56 AM
01-20-2015
07:56 AM
Hello Why would you NOT enable Loop Guard on switch ports? It is disabled by default on all ports. Since it prevents loops, in the absence of receiving BPDUs on non-designated ports, why would it not be enabled by default?
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Labels:
01-19-2015
02:53 PM
Under traditional 802.1D, a different mac address is used for every Spanning Tree Bridge ID (one Bridge ID is required per vlan. Applicable to PVST+. If you use Extended System ID to define the Bridge ID, then you don't need as many mac addresses because the vlan id will be used as the 12 bits in the Extended System ID, to make it unique from other Bridge IDs
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01-19-2015
02:43 PM
It seems that you already have it configured correctly. If you have have BPDUGUARD enabled on a port, and you have a switch that understands STP (it sends BPDUs) the port will go into errdisable state (won't pass traffic), until you manually shut/no shut the port or use the errdisable timeout recovery command. If you want somebody to connect a hub or unmanaged switch, and retain the port's ability to pass traffic, then you have the port configured correctly already (bpduguard enabled on it). This is if the unmanaged switch does NOT understand STP. Just because a switch is unmanaged does not necessarily mean that it does not understand STP.
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Created by
clifford.gormle
in Switching
06-05-2013
07:45 PM
06-05-2013
07:45 PM
why did Cisco change the command from ROOTGUARD to GUARD ROOT
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Labels:
06-03-2013
06:11 PM
Thank you all! I selected the first response, even though you all gave great info. Not sure how to 'share' the correct answer. Cliff
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06-02-2013
06:28 PM
Hello I read that there is a limit of 128 spanning-tree instances per switch if using PVST, and that any instances greater than 128 do not us spanning-tree. Does the switch indicate that the 128-instance limit has been reached? Or do you just need to determine this by using SHOW SPANNING-TREE XXXX commands? Thanks
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Labels:
Created by
clifford.gormle
in Other Network Architecture Subjects
06-02-2013
06:06 PM
06-02-2013
06:06 PM
layer 2
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01-14-2013
08:49 AM
Hello Wenjin, I tried what you said, and there is no "->" key on the SPA502G, other than the Navigation Key arrows. From my past experience, I should see a 'conf' softkey on my phone. Thanks.
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Created by
clifford.gormle
in Voice Systems
01-12-2013
07:35 PM
01-12-2013
07:35 PM
Thank you Tom This was very concise and helpful. Cliff
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Created by
clifford.gormle
in Voice Systems
01-12-2013
10:25 AM
01-12-2013
10:25 AM
Hello, What are your experiences with either: 1) a computer and a voip phone sharing the same ehternet cable to a UC320 (the computer is connected to the PC port on a voip phone). 2) the computer being run to a UC320 on a dedicated ethernet cable to the UC320. I would like to use a separate ethernet cable run for phones and computers, but of course this costs $$$ to lay more ethernet cable drops. Does the QoS and CoS generally work good enough to use the same ethernet cable for both a voip phone and a computer? Thanks Cliff
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- Tags:
- uc320
Labels:
01-12-2013
10:19 AM
This is a design question. From what I have read, the UC320 does not have a built-in firewall. If this is the case, it appears that I need a separate appliance to be my Internet firewall. Is it standard practice to pass SIP through a separate firewall appliance, where this SIP trunk will terminate on my UC320? My UC320 will be behind the firewall appliance: Internet -> Internet Firewall -> UC320--Lan--pcs and phones. Thanks Cliff
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Labels:
01-12-2013
09:43 AM
Hello I have a UC320 with three SPA502G phones. 3 phones: x100 x101 x102 Confernce calling is not working as I expect it to. 1. I place a call from x100 to x101 2. x101 answers 3. x100 presses the CNF softkey (I forget the exact letters on the softkey) 4. x100 dials x102 5. x102 answers At this time I would expect to see teh CNF softkey available on x100, but it is not. I would expect to see the CNF key so I can join the three phones together in a 3-ay conference call. Shouldnt there be a CNF softkey be available on x100 at this time? Thanks
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Labels:
10-09-2012
08:19 AM
Hi Levi Do you have any more details on what a 'silent' ringtone is? Do you have more discrete steps of how you accomplished this? Thanks in advance! Cliff
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Created by
clifford.gormley
in Switching
01-20-2015
01-20-2015
HelloWhy would you NOT enable Loop Guard on switch ports? It is disabled
by default on all ports. Si...
01-19-2015
Under traditional 802.1D, a different mac address is used for every
Spanning Tree Bridge ID (one Bri...
01-19-2015
It seems that you already have it configured correctly.If you have have
BPDUGUARD enabled on a port,...
Created by
clifford.gormley
in Switching
06-05-2013
06-05-2013
why did Cisco change the command from ROOTGUARD to GUARD ROOT
06-03-2013
Thank you all!I selected the first response, even though you all gave
great info.Not sure how to 'sh...
06-02-2013
HelloI read that there is a limit of 128 spanning-tree instances per
switch if using PVST, and that ...
01-14-2013
Hello Wenjin,I tried what you said, and there is no "->" key on the
SPA502G, other than the Navigati...
Created by
clifford.gormley
in Voice Systems
01-12-2013
01-12-2013
Thank you TomThis was very concise and helpful.Cliff
Created by
clifford.gormley
in Voice Systems
01-12-2013
01-12-2013
Hello,What are your experiences with either: 1) a computer and a voip
phone sharing the same ehterne...
01-12-2013
This is a design question.From what I have read, the UC320 does not have
a built-in firewall.If this...
01-12-2013
HelloI have a UC320 with three SPA502G phones.3
phones:x100x101x102Confernce calling is not working ...
Public Statistics
| Date Registered | 10-15-2002 10:54 AM |
| Date Last Visited | 08-18-2017 04:00 AM |
| Total Messages Posted | 102 |
