Cisco Infrastructure :: 1921 / Implement Dynamic QoS Between Two Sites Across Low Speed WAN Link (512k)?

Jan 15, 2013

I have a trouble to implement dynamic QoS between two sites (Site A, and site B) across low speed WAN link (512k). On each site I have Cisco 1921 router. Most important app is Oracle. Because of slow speed WAN links, I want to avoid exact bandwith reservation for Oracle. I only reserve 5% bandwith for network control(icmp, ssh, telnet...) and want configure next Qos scenario:
 
1. If Oracle traffic exist on a network, it must have 70% of link speed guaranteed, all other apps (e.g mail, file share, ftp) use rest of the bandwith.

2. If there isn't Oracle traffic on a network, all other apps can use all available bandwith.
 
Issue descrtption:I used all Cisco guides, but when I implemented this on production it simply didn't work. There is no any significant improvement after implementing this (when I start network file sharing accross wan link, Oracle becomes etremly slow.).Here is configuration wich I trying to implement:
 
ACL-s and class-maps used to mark traffic:
 
access-list 119 remark ###QoS-MGMT###
access-list 119 permit tcp any any eq 22
access-list 119 permit tcp any any eq telnet
access-list 119 permit icmp any any
access-list 120 remark ###QoS-DB_ORA###

[code].....

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I need to implement the backup between two sites I have router 2800 which is having a point to point connectivity with the far end.At the far end there is no router ,only one firewall is there on that firewall one access-list is there to allow the traffic .To implement the back up link i have created a site to site vpn  .But the problem is as soon as the tunnel is establised .For the time being i have removed by site to site config from both firewall.

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We are having problems configuring NAT on our Cisco 1921 Router. Below is the running config. The problem we're having is for example our FTP server 192.168.1.16, cannot be accessed from its outside IP address, which is NATed on the router. The server is verified to be up and running and when we do a show debug ip nat, we see the router is translating outside users attempting to access the ftp server to it's correct internal IP address.

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Feb 6, 2013

I've been trying to set up my new Cisco 1921 Router to provide internet access to my local network but with no success. I've been reading guides and looking at videos and I have to be missing something becaouse I can't access internet (ping/tracert) from my local network.
 
The DHCP server works fine and the clients on my local network gets ip-adresses from the router but can't ping or tracert outside the local network.
 
[code]....

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May 15, 2011

I try to change modem speed from 1200 to 19200 on aux 0 interface.But I can't save the settings using "write memory" In show running-config, I can see modem speed successfully changed.
 
Cisco3825's OS information is here. c3825-spservicesk9-mz.124-25b.bin

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Cisco Infrastructure :: ASA 5510 - Plug In And Internal Switches Have Slow Speed?

Jul 19, 2012

I have a 100mbps internet connection from my ISP but once the connection hits the ASA the download speed gets reduced to 15mbps. My network is setup as follows: ISP Modem ---- Edge Switch ----- ASA --- Internal Cisco Switches

If I plug my computer into an extra port on the Edge Switch I get speeds around 92mbps with normal traffic still going to the ASA. But when I plug into the ASA and internal switches I have speeds of 15mbps.
 
I have made sure that duplex/speed match on the links. I have done packet captures and within  two minutes I do have several dup acks and retransmissions. The retransmissions don't seem to match the dup acks. (The retransmission is not for the dup ack requested so the dup ack keeps being resent)
 
The only interface error is on the inside interface which includes 700 overruns in a weeks worth of time.I am not using an IPS/IDS. I do have several vpns on it but was not going through a vpn tunnel. I am also using NAT.I am using an ASA 5510 8.2(1)

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D-Link DIR-655 :: Download Speed Fine But Upload Speed Is Way Slow?

Mar 17, 2011

I live in the tampa bay area, I have bright house (BHN) as my service provider, which provides a Road Runner Lightning (40/5) package.  I previously used BHN's top tier (20/2) back in July (and prior) with no problems.

After converting to Lightning in August of this year (2010).  Of course, BHN (and every other provider) wants to force a modem/router down your throat, so I had them bridge it (in short, turn it into a dummy modem with no routing). I had an SMC branded modem gateway at the time.  I work from home 2 days a week (so I can spend more time with my kids during morning, lunch, right after work) and this requires me to use QoS to ensure my VOIP work calls don't get dropped, if the family is watching youtube videos or watching netflex. 

My network was as follows SMC Modem >WAN IP>>WAN Port>>D-link DIR-655>>Switch Ports>PC1, PC2, PC3

Everything seemed fine (from a usability stand point) till about 2 weeks ago when my upload speed seemed to grind to halt.  Normally I was able to upload about 200-300K per second, and I noticed this dropped to about 45K per second during a drop box upload.   First thing I did was power cycle both my modem and router (in the proper/usual order).  After they both come up, I start using speed test to find out what my upload speeds were.  I was getting about 39Mbps down, but only .56Mbps up still.  I factory reset my router.... test, similar speeds.  Power cycle all computers (just in case), and then modem/router.  Tested, similar speeds.   Updated the firmware to the latest. Same issue

Called BHN customer service, they factor reset it, but it wasn't in bridge mode.  If I by passed the 655, in factory mode (non bridge mode) upload speeds returned to better than expected states.  If I bridged the cable modem, upload speeds seemed to crash.

Had BHN replace the modem, seemed fixed for a day, then issue came back.  Had them come back out and replace it again, this time with a Motorolla Surfboard modem... same issue.  Fine during factory reset, however after they bridge the modem, upload speeds were fine.  Told BHN I would take it from there.. Connected up the DIR-655, and upload speeds crashed again. (.6Mbps).  Called D-Link Support, and the Chinese English speaking rep seemed to not be listening to me and tried to have me adjust my MTU as well as Wireless settings.  Long story short... the rep was a level 0 id10t and I hope D-link will consider hiring better employees/contractors.  So I was all about to give up and replace it with a DD-WRT capable router (which it takes me a lot to want to swap hardware), when I discovered the wan shaping was on.  Which I thought to myself... nah... QoS has never messed up before... why would it be the cause.  Turned off wan shapping... and voila.  Issue seemed to be insta-resolved.

Unsatisfied with that... I decided to dig a lil deeper. I turned on Wan shaping again, but decided to set the settings manually instead of auto detect.   

Here are the settings I used... (Advanced Tab>QoS)
Enable Traffic Shaping - Checked
Automatic Uplink Speed - Unchecked
Manual Uplink Speed - 5000
Connection Type: Cable or Other Broadand Network

Enable QoS Engine - Checked Automatic Classification - unchecked (this checked seemed to affect my upload speed by about 5-10% during testing) Dynamic Fragmentation - unchecked (this checked seemed to be the worse enemy for upload speed)

While I know I'm not any network guru (still have to use a subnet calculator for subnetting), I think I did a pretty good job drilling down the issue (once I got passed my service provider replacing modems).

Anyways, I've had overall good luck with D-Link products, even have a 5 port 10/100 switch (all metal) from 1998 that works great.  Hopefully, D-Link will just either put more documentation on the web, or hire better employees.

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Oct 5, 2012

We want to puchase new Cisco ISR 1921/K9 .   i want to know does it support the following sample IP-SLA commands
 
ip sla 2icmp-echo 172.16.1.2timeout 500frequency 1ip sla schedule 2 life forever start-time now
 
track 10 rtr 1 reachability
delay down 1 up 1
!
track 20 rtr 2 reachability
delay down 1 up 1 
ip route 0.0.0.0 0.0.0.0 192.168.1.2 track 10ip route 0.0.0.0 0.0.0.0 172.16.1.2 track 20
  
Im asking above question because we will need to enable ip-sla  on  the mentioned router.   as i read on the cisco webside, it says Cisco-ISR-1921/K9-IP Base  support only  IP-SLA RESPONDER  feature nothing else. If  Cisco-921/K9  does not support the above commands , should i go for ordering Cisco-1921-SEC/K9 ? 

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Mar 13, 2012

I followed the instructions in the manual for checking and changing the MTU on the router.  It didn't have any effect.  When I take the router out of the system and go directly to the modem, I can get the sites.

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Nov 18, 2011

I have two sites linked by fibre a few miles apart, site A is on a 10.0.0.0 range, site B is on a 192.0.0.0 range, at site b there is a firewall with 2 cards, Site A also has a firewall, it external is poiting to the internet at site B, so basically site A get it internet from site Bs internet. Now they have decided that site A needs to be able to have access to one sql server at site B, how can this be achieved without allowing all traffic across the link, as, for example, both sites have their own DHCP for and cannot have site A giving out IPs to site B, so its a bitmore complicated than just linking the two can it be as simple as a masquerading rule at site B, with a second card in the sql server or 3 VLANs at site B (one for site b one for site a and one for the external internet, with site As traffic tagged), idk i cant get my head around it.

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Aug 8, 2011

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Dec 3, 2012

I have dir655 Hardware Ver B1 Firmware Version: 2.10NA.Comcast Motorola cable modem surfboard SB5101. The problem started happening a couple of days ago. When my computer is hooked up to the cable model directly, i am able to connect to outlook.com just fine but when i go through my router, it can't connect to the site. I played with MTU (lower it by 10) all the way to 1300 but it didn't work.The problem started happening all the sudden without any changes in the cable modem, router or my computer.

I also tried cloning MAC address from my pc but didn't work.I also tried turn off both modem and router, wait 2 minutes, start modem, wait for all lights to come up and start the router.Sites i can't connect are: outlook.com, starcraft2, Comcast, eBay, Facebook.One thing that i noticed weird is that i am able to connect to cnn.com using IE9 just fine but ping shows: [code]

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I have the dir-601 as my main router. Its IP settings are dynamic, not static. My second router, the router I'd like to use as the access point is a Belkin Wireless G Mimo. My goal is to setup the Belkin as an access point downstairs away from the main router. I'd like to do this wirelessly. I'd like to phsycialy plug devices into the Belkin, while the Belkin receives access to the internet wirelessly from my main router, the dir-601.

Here's my issue. There's an easy option to use the Belkin as an access point. So I do this and set the Belkin router to an IP outside the DCHP range ( currently 192.168.0.100 - 192.168.0.199 ) to 192.168.0.250. My dir-601 will only recognize the Belkin access point while plugged in physically. I know this because when I did a ping test it only see's the Belkin when plugged into the dir-601 via ethernet cables. My ultimate goal is to simply set the dlink dir-601 to recognize the Belkin as an access point.

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Connectivity at the moment SiteA: Switch1(3560)------100Meg--------.SiteB: Switch 2(3560)
 
I Want to configure SiteA: Switch 3(4507)------1gig (Active)--------.SiteB: Switch 4(3560) SiteA: Switch1(3560)------100Meg(Standby)--------.SiteB: Switch 2(3560)
 
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