Cisco Switching/Routing :: Traffic Within 3750 Slow / But Fast Outside Of It

Jul 15, 2012

I have 2 new 3750g devices in a small environment.  switch1 acts as our collapsed core and has ip routing enabled, and is connected to a ASA 5510. There are 3 HP l2 switches connected to switch1 as well.   switch2 is simply a server switch.  switch1 and switch2 have a 2port etherchannel between them, and a vlan trunk carrying 4 vlan's.  traffic between any 2 hosts on switch2 (same vlan) are slow. (average 300Mbits/sec)  If I move one of those hosts to switch1, speeds increase by 3 times.  (average 900 Mbits/sec).  Additionally, traffic between any 2 hosts on switch1 are quick. testing is done with iperf as well as timing 1gig file transfers.
 
I don't see any errors or drops anywhere, and there are no other symptoms other than slow transfer beteween hosts on switch2. I just got 2 more of these 3750's to put in a 2nd site that we have, put a quick configuration on them, and have the same result.  Other than switch1 having ip routing enabled, the configs are pretty much identical.

View 2 Replies


ADVERTISEMENT

Cisco Switching/Routing :: (lacp Rate Fast) In Catalyst 3750?

Dec 24, 2012

I am running the latest version of 12.2(55)SE6 on the catalyst and I am looking for this command "lacp rate fast" but it is not there:
  
lab-c3750#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
lab-c3750(config)#interface g1/0/5
lab-c3750(config-if)#lacp ?
  port-priority  LACP priority on this interface
 lab-c3750(config-if)#lacp
 
According to this link, it is supposed to work: [URL]Am I missing something?

View 2 Replies View Related

Cisco Switching/Routing :: PBR And Fast-switching On 3750

Dec 10, 2012

Which is the best routing method for PBR? is it fast switching? If it is, how can I enable It in my 3750?           

View 1 Replies View Related

Cisco Switching/Routing :: Slow Throughput Between 3750 Etherchannel

Apr 23, 2013

We've installed cisco devices accross our site in the last year or so and slowing getting on top of it now. How ever our old unmanaged kit seems to be out performing it. It's most like down to my misconfiguration which has lead me to here. Below is the details of hardware and configuration between devices. 3750 Core consisting of the following stacked. [code] I've got MRTG monitoring traffic and the throughput seems to max out 24m/s,

View 15 Replies View Related

Cisco Switching/Routing :: VTP Traffic Not Seen On SPAN Port On 3750

Dec 12, 2011

Been dealing with a strange problem for several days now.  It started out with a problem that I thought was VTP related but ended up being something else.  I setup a span port on a 3750 that I am connected to that was mirroring the trunk connection coming into the switch.
 
Never saw an VTP traffic come across the connection but doing a sh vtp status indicated the traffic was arriving and getting processed.  When I found some debug commands (debug sw-lan vtp), I was also able to see the packets go between switches.  Seeing this issue concerns me that there is other traffic that isnt showing up during a span session.
 
I know that doing a span on a switch, especially using a trunk port as a source, isnt a good idea.  Since I didnt have a TAP at time, this was my only choice.  I have since borrowed a NetOptics TP-CU3 tap from a good friend and was able to confirm the VTP traffic was going across the trunk connection between switches.
 
All of my 3750's are running 12.2.55.SE.

View 8 Replies View Related

Cisco Switching/Routing :: 3750 - Only Allow Specific Traffic To VLAN

Oct 10, 2012

Have a quick question regarding inter-vlan routing on a 3750.  Overview of network is ISP --> ASA --> 3750 (acting as my core and default gw).  I have 5 vlan interfaces on my 3750, all w/ 192.192.x.x subnets, a 6th w/ 192.168.100.x, and a 7th w/ 192.168.200.x.  I have enabled "ip routing" on the switch and can successfully ping from subnet A to subnet B as long as both devices are using the correct DG for their vlan, which is the switch.  I have a few ports that are trunked as well that go to ESX hosts which break out the vlans according to the subnet the vm should be attached to.  The ASA is set to nat internal traffic for all the vlans.
 
Now my question:  short of applying an ACL to each vlan interface to block traffic from other 192.192.x.x subnets is there a better way to accomplish this?  I want my 192.168.10.x subnet to be able to reach all the subnets, but don't want 192.192.10.x to be able to talk to 192.192.20.x for example.  I was thinking to create an acl like this:
 
access-list 120 permit ip 192.192.10.0 0.0.0.255 access-list 120 deny ip 192.192.0.0 0.0.255.255 192.192.10.0 0.0.0.255access-list 120 permit ip any 192.168.100.0 0.0.0.255 192.192.10.0 0.0.0.255
 
and then applying this to the interface for the appropriate vlan. 

View 4 Replies View Related

Cisco Switching/Routing :: Keep Traffic Local Between Two Sub-nets Using 3750-X

Nov 13, 2011

We have a remote office with a Cisco 3750-X switch with the IP-Services feature set connected via dark-fiber to a 6509-E at the corporate office. We plan on migrating the remote office to a new network (new acquisition) to subnet 10.10.10.0 on VLAN 20 which has an existing  subnet of 192.168.100.0 and we would like to run both in parallel using their existing switches (Dell) and the new 3750-X.
 
I’m curious as to the best way to keep the traffic local between the two subnets using the 3750-X and if necessary put the 192.168.100.0 network on a VLAN. I thought about routing between the two networks via IP routing on the 3750-X but the new workstations default gateway is the 6509-E and existing workstations is a SonicWALL within the remote office. The default gateway for the new workstations can be moved from the 6509-E as a last resort.

View 5 Replies View Related

Cisco Switching/Routing :: 3750 - Tagging Traffic By IP Source And Destination?

Dec 2, 2012

I want to know if there is way to tag traffic with DCSP tags without having to do all the other requirments of QOS setup.  All i want to do is just tag traffic at different DCSP values via source and destination IPs.  We do not have a need to be priortizing traffic on out internal switches.  We just want to tag the traffic so our MPLS provider can distinguish the different types of traffic.
 
Our environments is primarily 3750s in all offices.

View 6 Replies View Related

Cisco Switching/Routing :: 3750 Switches Doesn't See Traffic From Other Network

May 21, 2012

we have three separated network segments going to one Cisco 3750 switch all is L2 .. from this switch is 100 mbit uplink.we need to apply some Qos mechanism not to saturate line by traffic from one network.. Configuration from various reason CANNOT be done on switch where 100Mbit line is terminated.. so all must be done on SW1,2,3..Correct me if iam wrond but as switches doesnt see traffic from other network iam affraid only think we can do  is limit bandwidth on links going into SW1,2,3 to 33 Mbit.I found commad srr-queue bandwidth limit.But links going to SWs are 1Gbit so if i force bandwidth to 10% (minimum what command allows) its  100 Mbit..If I force speed on those links to 100Mbit and than apply  srr-queue bandwidth limit to 30% doest it work.??. Will  srr-queue bandwidth limit speed to 30Mbit?? Or srr-queue bandwidth limit is calculated from maxim speed of interface?

View 1 Replies View Related

Cisco Switching/Routing :: 3750 Cannot Mark Http Traffic With DSCP

Mar 14, 2012

I am trying to mark http packets from a web server with DSCP ef, but when I am doing a traffic capture all http packets have tos 0x0.I am able to mark UDP and ICMP packets originated from this server, but not any TCP traffic.The web server is in VLAN 20This is my config mls qos ip access-list extended MARK-HTTP-ACL  permit tcp host 10.10.10.10 eq www. [code]

View 4 Replies View Related

Cisco Switching/Routing :: 3750 - How To Isolate Fiber Port Traffic

Jun 18, 2012

We would like to setup a link to our DR site that is separate from our main network traffic.  This link will be used by an EMC VNX SAN for replication traffic.  The SAN will be plugged into a fiber port on a 3750 switch and going out from the same switch (going in as multimode, going out as single mode) into a patch panel that runs over to the DR site (about a mile away).  At the DR site it will go from the fiber panel into another 3750 switch which ends up going back out of that switch into our DR SAN.
 
I'm wondering what the best way would be to configure the fiber ports to accomplish this.  I'm affraid that the replication traffic will find it's way over through another route and congest our main network unless configured appropriately.

View 4 Replies View Related

Cisco Switching/Routing :: Traffic Policy Is Not Working On Catalyst 3750?

Jan 28, 2013

Unable to limit traffic on catalyst 3750 gigabit ports it has fiber modules,
 
I want to limit traffic 2mb per port
 
I have tried srr-queue and policier but it is not working and there is no ratelimit command under any interface, Applying policy to output is not supported of the interface
 
policy-map rate-limit
class class-default
police 2000000 8000 exceed-action drop
int gi1/0/3
service-policy input rate-limit 
 
still when I start download it goes to 10 mbps

View 12 Replies View Related

Cisco Switching/Routing :: 3750 / How To Identify Broadcast Traffic Source

Feb 23, 2012

We have 2 switches split across 2 datacentres connected via an interconnect.  Over the past couple of days the interconnect provider's Cisco kit has shut down our port (err-disabled) due to a broadcast storm.  They had the level set at 1 which I thought was a bit low.  They say they tried to set to 2, then 5 but still kept tripping the storm-control feature so they set at 10.  They say they've always had it set at 1% (on a 100Mb switch) and so we must be generating more broadcast traffic.
 
I'm trying to identify where the broadcast traffic is coming from.  On our Cisco 3750 I've clear interface counters and when I do a sh run | i broadcasts there are a few ports which have what seems like a high broadcast count.  The one port that is especially high and the only one tripping the storm-control feature (I've enabled on all our ports to try to identify where the traffic is coming from) is the port connected to the 100Mb interconnect.  I've mirrored that port to another port and connected a server with wireshark so I can capture all the traffic across that port. 
 
What I'm struggling to find is the source of the broadcast traffic.I have a few questions are these broadcasts layer 3 or layer 2 broadcasts.  Also in the output below when it says broadcasts received is this inbound to the port i.e. from the connected device or is this a total of inbound and outbound broadcasts.
 
When I use wireshark and filter the capture on broadcasts (ff:ff:ff:ff:ff:ff) I see only 200-300 compared to the thousands the switch is reporting.If I filter on the broadcast IP address I also don't see the numbers corresponding to what I see in the show interface output.
 
GigabitEthernet1/0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0014.a93f.7401 (bia 0014.a93f.7401)
  Description: Interconnect
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 4/255, rxload 44/255
  Encapsulation ARPA, loopback not set

[code].....
 
also I'm currently doing : monitor session 1 source int g1/0/1 both, and also tried just rx incase I just need to be looking at receive traffic but still nothing is standing out.

View 10 Replies View Related

Cisco Switching/Routing :: 3750 - Route Traffic From Server To End User?

Jun 3, 2013

Actually i have a design from my customer who have ( Cisco core switch 3750 (allports fiber ports) which is connected to L2 switches , these switches carry servers and end users .the only routing protocol on the access switches is static route ,
 
My question how can i route the traffic from the server to the end user , as the the server is not direct connect to the core switch.

View 6 Replies View Related

Cisco Switching/Routing :: Switch 3750 / Policy Inbound Traffic Per IP?

Mar 2, 2012

We are using Cisco 3750 switches in our environment as distribution switches.We currently use to police inbound traffic, but we need to find a solution to limit inbound traffic per IP.Something like this “Inbound traffic for each IP can be maximum 1 Mbps” This can be done having, one ACL and one class-map for each IP, but in my situation is not a practical solution, because we have more than 500 IP’s on that site.
 
Is any way to accomplish this without writing 500 ACLs and 500 class-map?

View 2 Replies View Related

Cisco Switching/Routing :: Capturing Traffic Flows From 3750 To 6509 Then To Netflow

Aug 6, 2012

I am aware that the 3750 switches are not able to support Netflows, so I have created a SPAN port and spanning traffic from a specific port. I would like to create a seperate VLAN and trunk the traffic from the SPAN port down to the 6509 switch and then capture all the traffic for that VLAN on the 6509.

View 4 Replies View Related

Cisco Switching/Routing :: Block / Permit Intra Vlan Traffic On 3750

Feb 21, 2013

I have One switch 3750 and many switch 2960 c.I use one ASA 5510 to reach emote branche site (vpn conexion).I use one router 1841 for internet conexion.Router 1841, ASA and catalyst 2960 are connected on the 3750.Default gateway of all user is ASA IP
 
I configured Vlan 3750 and it work.Now I need to implement security : permit/block specific traffic between vlan [code] From vlan 72 I cannot have remote access on computer in vlan 34 and I cannot ping computer in vlan 34.

View 1 Replies View Related

Cisco Switching/Routing :: Setup VLan To Allow Video Traffic Between 2960 And 3750?

Nov 13, 2011

I am trying to setup a network using Cisco 2960 switches with vlans configured.  One vlan will handle video coming from four cameras that are connected to another 2960.
 
We have four cameras feeeding one port each on a 2960, that 2960 in turn feeds one port on the main 2960 which is the video vlan for that site.  From the site it goes back to a Cisco 3750 to be sent over to a Sonicwall firewall. If we connect to the 2960 that the camera are connected to we can see the video, but not on the main site 2960.

View 5 Replies View Related

Cisco Switching/Routing :: 3750 Switch - Routed Interface / Traffic Composition

Feb 21, 2012

On a router I can use IP Accounting or Netflow to see what kind of traffic is moving over an interface.  Are there any tools on a 3750 switch with a routed interface which would tell you who is hogging the bandwidth on that interface?

View 2 Replies View Related

Cisco Switching/Routing :: Catalyst 3750 Frame-Relay Traffic Shaping Not Supported?

Jan 27, 2013

I have catalyst 3750 I want to controle traffics on every port I have tried Frame-Relay Traffice shaping and Quality of service but there is no support for these commands in the switch.do we have any way to limit traffic on every port in catalyst 3750 and 2960 switches ?

View 4 Replies View Related

Cisco Switching/Routing :: 3750 - Show Interface Vlan (ID) Doesn't Show In / Out Traffic Rate

Mar 13, 2013

I have configured a vlan interface on a 3750 switch. there is aprox 4Mb active traffic flowing through the interface, but when I do a "show interface vlan (vlanid)" the output show zero bits in and zero bits out. Its a typical L3 config with one IP on the vllan interface acting as the gateway for the VLAN devices. Is this a normal behaviur ? and if so is there any way to get the traffic in/out stats. The end PC/devices are connected to this switch via an L2 TRUNK and I dont have access to the L2 switch on which the actual devices connect. so cant get the real time stats of those interfaces.

View 2 Replies View Related

Cisco Switching/Routing :: Getting Second Fast Ethernet On 2620xm?

Aug 11, 2008

I am having a heck of a time finding information on this.  I have a 2620xm router that only has one Ethernet port on it.  Is there an expansion I can get that allows me another Ethernet port. I have thus far assumed that all of the WIC cards won't allow me to attach to an Ethernet LAN.

View 7 Replies View Related

Wireless Connection Should Be Fast But Is Very Slow

Feb 23, 2012

I am using a Samsung N210 with 2GB of memory in it and Windows 7 Starter. When I use the wireless connection the "Connection Status" shows as 72Mbps, which is to be expected considering I am only a few feet from the router.the speed is nothing like that in reality. I tested the actual transfer speeds for the wired and wireless connections by copying a 238MB folder with 77 photos in it. I copied it from the NAS device, where I store all my files, to the local disk of the netbook.

View 2 Replies View Related

D-link Dir-600 Lan Slow While Wifi Fast?

Nov 19, 2012

I have a 10 Mbps Internet connection, if I connect my PC directly to my modem I get the 10Mbps sometimes more, also I get them if I connect my modem to my switch and from the switch the computer.The problem comes when I connect my modem to the D-link DIR-600 router and from the RJ-45 connectors of the D-link I connect my computer, i get 0.80, 1.5 max. and my wifi devices gets the 10mbps. What is happening with the D-link RJ-45 slots or im missing something in the configuration?

View 1 Replies View Related

Cisco Switching/Routing :: LACP Fast Updates On 3750s?

Sep 5, 2012

I've got LACP-enabled port-channels between a Cisco 3750 stack and a few different switches (some Cisco 3750s and some Juniper EX2200s).  The Ciscos are all sending slow LACP updates, the Junipers are sending fast LACP updates (but the Cisco they connect with is responding with slow LACP updates).
 
I have a couple of questions:
 
1) what are the pros and cons of slow vs fast updates?  my research has led me to the conclusion that fast updates are better for network resiliency as long as you have plenty of bandwidth overhead (which I do at the moment).  is there anything to add to this conclusion?
 
2) is there any way to configure the Cisco 3750s for fast updates?

View 3 Replies View Related

Cisco Switching/Routing :: ADSL On Fast Ethernet In 1801?

Apr 24, 2012

I have cisco 1801W . Earlier I am using ADSL dynamic IP address  on RJ 11  through the ADSL Port but now the ISP change the connection to RJ45.
 
I am trying to configure it but unable to do this. ADSL line is okay because When I am connecting through the ISP router it is working fine. I have connected the ADSL RJ45 cable in the router fast ethernet 0.But I wanted to use Cisco 1801 Router so that I can use the ADSL as primary and ISDN as the backup.
 
Below is my configuration, eiteher this is possible to configure ADSL through RJ45 in 1801 and what configuration require for this.  
 
Router#show ip int brief
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0              unassigned      YES DHCP   up                    up
BRI0                       unassigned      YES unset  administratively down down
BRI0:1                     unassigned      YES unset  administratively down down
BRI0:2                     unassigned      YES unset  administratively down down

[code].....

View 2 Replies View Related

Fast Download Speed On Only One Laptop Others Slow

Jan 7, 2011

Earlier today Comcast came to our house and upgraded our internet from 12 MB/s to 22 mb/s speed.We have a larger house using wifi internet with 3 laptops (2 XP, 1 Win7).Our wifi has always slowed down speeds on the computers.Our laptops were generally getting 3-6 download speed via speedtest.net.Then when we plugged in directly we got full 12 mb/s.So we figured, hey lets upgrade our internet to get faster speeds around the house!Today we are doing speed tests with the new 22mb/s and only my dad's win-7 laptop is getting 21mb/s via wifi. Even when right next to the router the other 2 laptops only max out at 6mb/s and can not go any higher. When directly connected they get the full 22mb/s.

why is it that one computer gets full speed via wifi when the 2 XP computers do not? It really seems like the speed has a cap at 6.35mb/s download, never goes higher on the speed test.Currently using a Linksys WRT160N Router.When I check the DHCP Client Table it shows that all computers are connected via Wireless-G so it's not a connection type.Is there a specific setting on the XP computers that are capping speed?

View 7 Replies View Related

Download Speed Slow On One Router But Fast On Another?

Nov 21, 2011

i have a laptop that i connect through our wireless router with, and for the past couple months my download speed have been terrible. my browsing speed is just as fast as it always was when i am connected to our router, just incredibly slow if i try to download or stream something.however, my downstairs neighbor also has a wireless router set up that i can access which gives me incredible download speeds but my cant even browse the internet because i the browser connection times out.i have tried plugging directly into my router to on the thought that perhaps the 2 routers' wireless was somehow interfering with each other, but my download speeds are still *** even then.

View 1 Replies View Related

Wireless DSL Speed Fast One Laptop Slow Other?

Feb 22, 2013

ISP provides us with 20 mb/s download speed. Both Toshiba laptops used to be able to attain this but after reinstalling windows xp on this laptop, it can only achieve 8mb/s. The other laptop will get 20 mb/s whether connected wired or wireless. For the life of me cannot figure what has changed. I have installed all windows updates including SP3 and updated all drivers via Toshiba website. It uses the Intel 3945b/g network card and the router is a motorola sbg 6580.Connecting wired will achieve 20mb/s so it has something to do with the wireless setup.Have tried connecting to router with WPA, WPA2, and no encryption but makes no difference.Testing right beside the router or 30ft away makes no difference.Have uninstalled/reinstalled network card but made no difference

View 6 Replies View Related

Reformatted Laptop / Internet Slow On One Fast On Other

Mar 1, 2011

I recently acquired a laptop from a friend, he was having problems with it and decided to just give it away and buy a new one, I took and it examined the problem, it is a HP Pavillion laptop running on Windows 7.When I booted it up it said "NO BOOTABLE DISK" or "NO BOOTDISK INSTALLED" or something of that nature.I realized that the harrdrive was fried so I bought a new harrdrive and installed it into the new laptop, reinstalled Windows 7 onto the laptop and installed all the required drivers.I don't understand why, my old laptop running on Windows XP, it runs fine and smoothly, pages open quick and downloads finishing fast and smoothly.But when it comes to the Windows 7 laptop, A 2mb file takes almost 30 mins just to download, web pages take forever to open up.

View 10 Replies View Related

Motorola Sbg 6580 - Speed Fast On One Laptop But Slow On Other

Feb 23, 2013

ISP provides us with 20 mb/s download speed. Both [COLOR=blue !important][COLOR=blue !important]Toshiba [COLOR=blue !important]laptops[/COLOR][/COLOR][/COLOR] used to be able to attain this but after reinstalling windows xp on this laptop, it can only achieve 8mb/s. The other laptop will get 20 mb/s whether connected wired or wireless. For the life of me cannot figure what has changed. I have installed all windows updates including SP3 and updated all drivers via Toshiba and Intel websites. It uses the Intel 3945b/g network card and the router is a motorola sbg 6580.

View 7 Replies View Related

Wired Internet Speed Is Inconsistent Slow And Fast

Nov 15, 2011

Webpages sometimes load quite sluggish and when playing an online game I am experiencing much more lag. However, if I try loading the same webpages a few minutes later, they will being loading fast again. It seems as if my internet is periodically slowing down. Using speedtest.net, it shows 10Mbps download and 9Mbps upload. However, sometimes when I run speedtest again, the download portion will hang and the test won't complete.My internet provider is COX Communications. I do not think I am using a router as it is university provided internet so I connect my Ethernet directly into the wall jack.

View 3 Replies View Related

Internet On PC Is Slow / Fast On Every Other Device On Wireless Network

Oct 21, 2012

I just reformatted my PC and the internet is really slow. I should be getting 15 Megs down but only getting as little as 1 Meg down. Every other PC and device in the house is getting 15 down. why my PC would be slowing down my speeds?

View 1 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved