Cisco Switching/Routing :: QoS Differences Between 3750X And 2960S Platforms
Apr 24, 2013
We are looking to replace some aging 3560 switches with 100Mb/s interfaces. They service IP phones and workstations.
For having IP phones directly connected to access switches that are also servicing workstations, we don't need L3 routing except in the core, so the question is what would we lose if we used 2960S switches for access switches.
I understand from having spoken with Cisco TAC that a limited subset of QoS is available on the 2960S platform. Does that includes the priority queue that is enabled when you turn on mls qos on a L3 switch?
I'm looking at implementing a new DMZ and wanted Netflow capability for security monitoring.The architectural principles I have to adhere to dictate that the switches within the DMZ are layer 2 however to get Netflow I need a minimum of a 3560/3750X, Network Services module, IP Base IOS with ip routing and CEF enabled.To do this and still keep the switch functioning as a layer 2 device the intention was not to configure SVI's or any static/dynamic routing protocols.Will Netflow still work in that scenario?
We replaced a 3560 with a new 2960S and I'm only able to configure a single ip sla where before we had three ip sla entries on the 3560. Obviously, one is a L2 switch and the other a L3 switch. This is an expected difference between switches, correct?
2. Both switches have VLAN 20 and VLAN 1 on their database and both are active. BTW, after I figure out how to properly configure interVLAN routing the native VLAN 1 will not be used anymore. This is just an initial test.
3. VLAN 20 SVI interface (IP 192.168.20.200) on 3750 is up and can be pinged from catalyst 2960.
4. VLAN 1 SVI interface (IP 192.168.170.200) on 3750 is up and also can be pinged from Catalyst 2960.
5. Catalyst 3670 can ping a client computer (IP 192.168.20.10) connected to Catalyst 2960.
6. IP route enabled on 3750
7. Trunking is enabled on etherchannel connecting both 3750 and 2960
8. Client computer in VLAN 20 (connected to 2960) can ping VLAN 20 SVI interface 192.168.20.200 on switch 3560.But, the client computer in VLAN 20 can not reach any computer in VLAN 1 and vice versa. Strangely, the switches which these computers are connected to can ping each other or any connected client copmuters without any problem as described above.
Has anything changed in the way of defaults for creating a trunk port and spanning-tree between a 3750x and the newer 2960s? I have one of each I just took out of the box and applied my standard switch configuration template but I cannot get my VLANs that are configured on my 3750X to appear on the 2960S. I find nothing that is blocking and everything seems to be forwarding and I am running out of things to check.
Yesterday Cisco released IOS 15 code into the wild for the 2960 and 3560/3750 families but the link to the release notes is not working. Because I already have a whole bunch of 4500/Sup7's running IOS 15 I am thinking about taking the plunge with 30 3750-X's I have on order but want to review the release notes first. where they might be hiding?
I am working for a customer on an enterprise site containing many 6509's. We have built a test environment and upgraded a chassis from sup720 running 12.2(18)SXF15 to VS-S2T-10Gb running 12.2(50)SY on the management card. I have noticed and so has the customer that there are many commands missing or added and they want an expalnation of these. I can do some of them easily, change syntax etc but for instance it has added a table-map, 50 vlans with a large MTU and large COPP policy.
What are these ?? and also is there a quick way resource etc to find out why the commands have been added/removed, for instance-mls ip cef load-sharing full is missing--
I am trying to decipher the differences between the two models of the 1921 router. One has an IP Base IOS and the other has a Security IOS. I have an ASA so I don't think I need all the Security IOS bells and whistles on an internal router. Although, does the IP Base IOS allow for trunking and sub interfaces? I definitely need that and on CDW's website it says that the 1921-Sec/K9 w/ Security IOS includes 802.1Q and that spec is not listed on the 1921/K9 IP Base IOS model.
I understand that my questions seems to be rather strange cos supervisors is rather old (Sup1A especially). But i am interested in understanding what puprpose were in production SUP32. I cant find out enough differencies between Sup1A with MSFC2 and Sup32 to understand what reasons lead to deploying new sup in none fabric supervisor series.
Both supervisors have same perfomance - 15Mpps and have limitation on backplane bandwith of 32 Gbps (cos both use swithing bus), both supervisors equipped with MSFC2 and etc. Differencies i found:
SUP 32 have 10Gbe ports support (but this seems to be doubtful enhancement - with it perfomance GE ports seems to be more appropriate technology isnt it?) SUP1A equipped with PFC, SUP32 with PFC3BSUP32 deploys CEF (what is benefit of CEF if perfomance same?)
I have recently split the voice vlan (10) from the data network (1), and am wondering why my catalysts and router do not require an interface Vlan10 statement. In the past I used OpenBSD boxes to do the routing, and I first needed to configure vlan 10 on the interface before I could get inter-vlan communication to work. With these Cisco devices it works, and I am wondering if it is because of VTP, for the fact that the ports maybe just pass all traffic, or is there some other explanation? Below is the setup, and firmware is up-to-date on all of the devices.
When I plug a phone into the POE SGE, the phone turns on, obtains an address on the proper subnet, and conversations are clear (whereas without the ip nat inside on the new subnet the calls had a lot of static). Possibly the reason that it works is because the phones properly create the tcp/ip packet, and it hops over the trunks and creates the states so that traffic routes back properly. I will install wireshark to see exactly what is going on, but is there a simple explanation that I am overlooking?
I have C2960S-48FPS-L and C2960S-24TS-S both of them are using C2960S-UNVERSALK9-M image with version 15.0(2)SE on both I run "mls qos"
and on 48FPS-L I run "mls qos map cos-dscp..."on 24TS-S I cannot run it. there is no such command. there is just "mls qos rewrite..." and "mls qos srr-queue..." variants.
I thought that one image give the same set of commands...?
while i am configuring a port on switch .The switch reloads.After reload the show version says,System returned to ROM by bus error at PC 0x458F6C, address 0x0,show version from the effected switch is,Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1).
I am currently having an issue with connecting a Catalyst 2960-S switch to a Small Business SG300 switch. When I connect them they are unable to form a link. When I do a show spanning-tree it says the mst link is in dispute.
I read some papers about QoS. The thing is that I have to implement 30 switches with QoS to connect to a lot of Cisco IP phones. The switches are Cisco 2960S with code image "C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE3". Should I use autoQoS feature or manually configure them?. How should I treat uplinks between access switchs and core/distribution? I have a lot of doubts regarding queueing, because all the info I had read its for another model/image.
I'm looking at the WS-C2960S-48TD-L and have a question about the uplink ports. Is it possible to mix 10G on one uplink and 1G on the other? The datasheet says 2x10G SFP+, 2x1G SFP so I am thinking mixing is not possible.
just got new hardware and decided to try the newer USB port for IOS upgrades. I could not get the switch to recognize my 2gig flash drive. Do I need a proprietary stick or special format?
I also noticed when I removed it the switches crash dump and rebooted?
When using dynamic configuration tools, if I choose 2960 (not 2960s), I have the option to choose RPS2300 as redundant power, but when I choose 2960s, I cannot choose RPS2300. However, in a document describe both 2960 and 2960s, it said that RPS2300 can be used. Does RPS2300 support 2960S?
Recently I'm working with my client to setup their network and he want me to limit user access internet bandwidth to 2 Mbps and the topology show below.Users ---> Switch ---> NAT Router ---> (int gi1/0/24 - qos apply) Edge Switch ---> INTERNET ROUTER (12Mbps) --->> INTERNET,This is my configuration, but it doesn't work, the end user still able to get more than 2Mbps internet speed.Access-list 100 permit ip any any dscp default,class-map match-all QoS_Floor_Limit, match access-group 100.
I would like to enable port security to hardcode the MAC address on the ethernet switch. There are 5 ethernet ports in the same ethernet switch to be assigned for one person (one note book), e.g. port 5, 6, 15, 16 and 23. The model of ethernet switch is cisco 2960S and one MAC address is configured on 2960S.
1. Does 2960S support this requirement to allow input the same MAC address to 5 different port?
2. If yes, can ethernet switch "smart" enough to forward the packages to "active" ethernet port which is connected to notebook and the rest of four ports are inactive.
3. if no, any solution or any work around to achieve this requirement
We are designing a LAN Network for ourselves.The proposed design is as follows:
4 x 2960S switches in a Stack Access-Stack-I 4 x 2960S-PoE switches in a second Stack Access-Stack-II
2 x 3750X switches in a Stack Core-Stack
Now I would like to connect it in the following manner ?First,I would like to use EtherChannel using the 10Gig LinksSecondly, I would like to use Cross-Stack EtherChanel too.I have given a graphical illustration of the connectivity Now my Qs: a) Will the 2960S supports EtherChannel using the 10G links and the 3750X too... b) Does the proposed solution will work... or It will have any problems.
I have two switches (2960S's) both with IP Phones on VLAN100..We need to monitor voice traffic via a monitor port on SW1 of all VLAN100 traffic on both switches.The following is what we have configured, but we cannot see VLAN100 traffic on SW1
According to Cisco doco you cannot have a SPAN and RSPAN on the same session, however since these are two sessions on SW1, I would have thought it to be OK.
I have a running setup having 2 Cisco 2960s 24 TS switch with Stack configuration. Now I want to add one more same Cisco switch. My questions are:-
1) How can I do this...(Should follow the same process as I did before.
2) Could I do this without impacting the service. i.e. without rebooting the switch.
3) What should be the connection archiecture as of now since there is two switch so it is connected 1 -1 and 2-2. but for 3 switch should we require to change the connectivity.
i did on cisco 2960S switch at user ingress interface. but the marking is not showing in show policy-map interface gig 1/0/10 interface and ACL is not showing any match.
I also had a config reference from 2960S cisco guide.
access-list 103 permit tcp any any eq 80 access-list 104 permit tcp any any eq 23 access-list 105 permit icmp host 172.24.68.4 any
We have seen high CPU utilization on some Cisco switches of type 2960S. Also we got info, that applications are running with poor performance or with interruption.Following IOS is loaded: C2960s-universalk9-mz.122.55.SE
They have a /28 wan adress coming from ISP, that gives out 100Mbps, going to a Cisco 2960S switch (ver. 12.2) the switch is only holding 1 vlan. Connected to the 2960 are 3 firewalls/routers from other manifactors, each creating their own network. The customer wishes for a solution where each final FW/router gets minimum 33% and maximum 100% of the bandwidth, depending on how much each final Fw/router are in use.
I use the Switch 2960S support PoE and 10 access points cisco.I have one more question:
-- If all 10 access points cisco use copper cable to connect to 2960S, 5 access points use power adapter and 5 access points use power from Switch. How Switch 2960S will provide power for 10 AP or switch 2960S will understand and only provide power for 5 APs?
I have 4 switchs 2960s in stack, but this not full ring. [code]the interface stack 1 for switch 1 is down and interface stack 2 for switch 4 is down.I do insert this command "switch 1 stack port 1 enabled" but interface are not up.
