Question about Spanningtree port costs/priorities etc.. on catalyst switches
if for example switch port 1/1 has a port cost of 10 and a port priority of 32 and switch port 1/2 has a port cost of 20 and a port priority of 16 which port forwards which port blocks does port priority take presidence over port cost? first correct answer wins ! _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: trunking
ISL has a number of advantages over dot1q, for example it supports per vlan spanning tree (PVST) which allows a separate spantree instance per Vlan which makes networks more scalable and more stable than dot1q based. It is Cisco proprietary but it interoperates with dot1q (common spanning tree) compliant switches (using Cisco protocol PVST+) If you are building a large cisco switched network with alot of Vlans and are worried about issues such as spanning tree convergence/ stability /reliability .. definately go for ISL _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Vlan Question
Brad I expect you know - but you must have a layer3 device (router) between the two Vlans you can then apply access lists to the vlan interfaces on the router. What about dual NIC's in the server one connected to the Lan the other to the single user It would be a lot cheeper just don't allow the cards on the same network and don't let them forward (route) between each other. hope that's of some help - Original Message - From: "Brad Shifflett" [EMAIL PROTECTED] To: "Groupstudy (E-mail)" [EMAIL PROTECTED] Sent: Thursday, March 22, 2001 4:26 PM Subject: Vlan Question Scenario: Got a client who has a person on the network that does not want to be on the network but wants access to the server. My thought was to install a switch, setup to Vlans, one for all the users (10 or so) and the second Vlan for the 1 user by himself. This way no one can get to his machine, then setup an access list to permit his Vlan to access the first Vlan and deny all the other users to his Vlan. Does this sound right? Anything I am missing? Seeing if I understand Vlans correctly or not. Brad Shifflett [EMAIL PROTECTED] Micromenders, Inc. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
question - oversubscription on switch trunk links... or not?
Hello all, Can anyone advise/help with this? =20 Recently we installed a switched network using the cisco colapsed core = model. Our core/distribution switches are 2 cat 6506's connected to each other = via a gbit etherchannel providing 2 gbits of bandwidth between the core = switches.=20 Our trunk links from the core are fast etherchannel cat 5 providing 200 = mbts of bandwidth to each access switch. We have 5x cat 5500's providing access points into the network for end = our stations. Each access switch has approximately 50 end stations = connected and each end station has a full duplex 100mbits switched = connection. My maths is petty shaky but does this not mean that each trunk link from = each access switch should idealy be cabable of providing 50x100mbits = =3D 5gbits - 20% for the 20/80 rule 4GBits of bandwidth?=20 which, If i am correct means our trunk links are hugely over = subscribed!! Show proc returns an average CPU utilization on the access switches of = give or take 8% =20 The cores show approx 2%=20 Show traffic returns very low peak peak traffic stats (all switches = less than 8%) responce times are very good. =20 now for the question should i be concerned? If my maths is correct = why such low traffic/CPU stats,=20 is there a command on the switches to see how much bandwidth is being = used on the trunks? TVMIA=20 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: BCMSN - exam question
Thanks for the advice Charlie, I have attended the Course and have some experience of designing/supporting smaller cisco campus networks What worried me was that when I read the Exam outline /prep guide on the cisco web site, it said that ATM and LANE would be covered in the exam. I don't remember covering these in the course except for a very brief mention of the various trunking standards used. I expect that's why it was mentioned in the outline but I wanted to be sure Thanks again - Original Message - From: "Charlie Hartwell" [EMAIL PROTECTED] To: "ciscosis" [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Tuesday, March 20, 2001 7:55 PM Subject: Re: BCMSN - exam question I'm not sure if you have been on the BCMSN course (I hope you have if you have a copy of the notes!) but that was certainly sufficient for me. Of all of the CCNP exams, the BCMSN fitted the course notes the best. It's difficult when people ask questions like this because we don't know how much experience they have, you could have been designing and installing Catalyst based LAN solutions for years. Cheers Charlie --- ciscosis [EMAIL PROTECTED] wrote: my appologies if this has been asked before i couldn't find precisely = what I wanted to know in the Archives Question:- Are the course notes sufficient to pass the (640-504) switching exam.=20 could anyone recomend additional reading if they are not? =20 TIA=20 Ciscosis - A severe mental disorder, with or without organic damage, = characterized by derangement of personality and loss of contact with = reality and causing deterioration of normal social functioning. Known to = be caused by too much cisco study=20 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
question - oversubscription on switch trunk links... or not?
Hello all, Can anyone advise/help with this? Recently we installed a switched network using the Cisco collapsed core model. Our core/distribution switches are 2 cat 6506's connected to each other via a gbit etherchannel providing 2 gbits of bandwidth between the core switches. Our trunk links from the core are fast etherchannel cat 5 providing 200 mbts of bandwidth to each access switch. We have 5x cat 5500's providing access points into the network for our end stations. Each access switch has approximately 50 end stations connected and each end station has a full duplex 100mbits switched connection. My maths is petty shaky but does this not mean that each trunk link from each access switch should ideally be capable of providing 50x100mbits 3D 5Gbits - 20% for the 20/80 rule 4GBits of bandwidth? which, If I am correct means our trunk links are hugely over subscribed!! Show proc returns an average CPU utilization on the access switches of give or take 8% The cores show approx 2% Show traffic returns very low peak traffic stats (all switches less than 8%) response times are very good. now for the question should I be concerned? If my maths is correct why such low traffic/CPU stats, is there a command on the switches to see how much bandwidth is being used on the trunks? TVMIA _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
BCMSN - exam question
my appologies if this has been asked before i couldn't find precisely = what I wanted to know in the Archives Question:- Are the course notes sufficient to pass the (640-504) switching exam.=20 could anyone recomend additional reading if they are not? =20 TIA=20 Ciscosis - A severe mental disorder, with or without organic damage, = characterized by derangement of personality and loss of contact with = reality and causing deterioration of normal social functioning. Known to = be caused by too much cisco study=20 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
