EIGRP and Load Balacing Per Packet CEF required on both ends???

Here's what I have.
-2 T1's with same EIGRP metric
-CEF is enabled and load sharing currently
1 Link is being used more than the other due to nature of load sharing and not per packet using CEF.
I need per packet setup to see if this improves performance and distributes the usage over both links effectively.
If I enable per-packet on my remote office, do I also have to enable it on each PVC that connects back to my central office per PVC. Or can you enable per packet on the remote location only and be ok? I dont have control over central office router and need to justify if I need to enable that on the Central office or not.
Cisco docs I reviewed on this doesn't say both ends.

I agree with Sundar's point about needing to configure both ends if you want to use per packet in each direction. His point about the implications of forcing process switching and its impact on CPU utilization of the router is true but I am not sure that is what the original post was asking about. As I understood the original post he was asking about the per-packet option available with CEF switching which does not produce process switched packets.
I have one caution to offer about turning on the per-packet option with CEF. If you do that you will probably get better - but still not even - balancing of the serial links. But the performance may not improve. In fact it may degrade. This is because doing per packet balancing introduces the liklihood of out of order packets. The impact of out of order packets varies depending on the application being run and the impact of out of order packets. Many applications when they get an out of order packet will discard the packet and retransmit packets to get them in the correct order. I actually know of one customer site where they enabled per packet balancing and the performance of the application got worse. So I suggest that you evaluate carefully the implications of per packet balancing.
HTH
Rick

Similar Messages

  • Load Balancing per packet not working properly

    Hi,
    I am attaching you the configs of issue. There are two links E1 links from
    Karac-1(Serial0/0/0:0 & 0:1) and Karac-2 with (Tunnel10) which were connected with Khask-1w
    Now the issue is that Load balancing per packet were not done sucessfully the NMS snap shot is already attached.
    Load balancin g only configured in KarAC-1 & 2
    What is the resolution of this problem traffic only use on two links but third links were not utilize.
    Kind regards,Salman Ahmed

    Hi Paolo!
    I have one doubt pertaining to per-packet load-sharing. In order to connect my two data-centres- A & B, Site A is having two WAN links and Site B is having two WAN links - one from ISP1 (30Mbps link) and the other from ISP2 (50Mbps link). I am doing static route load balancing using same AD values for both the ISPs. I have configured "ip load-sharing per-packet" on both the outgoing interfaces.
    The load is getting distributed equally across both the links but total bandwidth utilization across both the links is not going beyond 30Mbps. The combined bandwidth of both links is 80Mbps (50+30). However links are not getting fully utilized even though heavy load is there on the links. Can you please tell me how to make full use of both the wan links at both the ends? OR Can you tell me how I can distribute the traffic across both the links with full utilization without using per-packet load sharing. Moreover, my links can be configured statically only at both the ends.

  • Cat3560 ip load-sharing per-packet

    What IOS for the cat3560 have on interface configuration mode command:
    ip load-sharing per-packet ?
    On my cat3560 with IOS c3560-ipservicesk9-mz.12.2-25.SEB4.bin
    I have only:
    Switch_A(config-if)#ip load-sharing ?
    per-destination Deterministic distribution
    <cr>
    Thanks in advance.

    none, the platform does not support per packet load-sharing at all. Same with higher end catalyst switches.
    Please rate helpful posts.

  • Does Revel have a backup retention for deleted files in the cloud and what is the encryption level it uses both end-to-end and locally?

    I'm interested in the premium version of this service however I'd like to know if:
    1. Revel has any kind of cloud backup feature for accidentally deleted files.
    2. What encryption strength does it use for it's end-to-end transfers and also for the local app and cloud storage
    3. Does it have 2 stage authentication?
    I ask because I need something picture friendly but is also HIPAA and SEC compliant.
    thanks!

    Hi nick2048,
    We take security and privacy very seriously and send all communication over encrypted channels.
    However, as a consumer photo site that supports user sharing, it is not our goal to achieve HIPAA certification
    Hope this helps!
    Glenyse

  • Per Packet load Balancing in Cisco Switches

    Hi Team,
    Can we enable per packet load balancing/sharing in cisco 3560 and 4948 Switches ? I can see two routes are installed in routing table for a destination prefix but for traffic to specific destination is not going across both the link. The option what i am getting  in command line is ip load-sharing per-destination but not  ip load-sharing per-packet.
    Please do let me know is there any option to do per-packet load balancing
    I have tried disabling route-cache, cef etc.. no result.
    Rgds
    Rama

    Hi Ramachandra,
    On both these platforms per packet load balancing is not surpported.  it is a feature mostly seen in routers.
    it can use the following variables for the load sharing hash  (but the per packet is never used)
    Source ip
    Dest ip
    Source tcp port
    Dest tcp port
    so you can configure flow based sharing based on above parameters on both the switches.
    The more random variables going into the hash equation the more likely of an even distribution across links.
    The src/dst ports in the equation gives us this randomization. If the same (static) variables go into the hash, the
    same link is chosen.
    Follow this link for more details:
    http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25sg/configuration/guide/cef.html#wp1150531
    cheers,
    sandeep

  • Packet per packet load sharing

    hi, my question:
    i have two routers which are connected over two links (same type, same speed).
    now i want to change from per destination to per packet load-sharing.
    i know there is the command "ip load-shar per packet" but my question:
    must i use this command on all 4 interfaces (2 interfaces - two router),
    or must i only configure this on one interface per router ??
    thanks for answer !

    hi there. I have one doubt pertaining to per-packet load-sharing. In order to connect my two remote sites- A & B, Site A is having two WAN links and Site B is having two WAN links - one from ISP1 (30Mbps link) and the other from ISP2 (50Mbps link). I am doing static route load balancing using same AD values for both the ISPs. I have configured "ip load-sharing per-packet" on both the outgoing interfaces.
    The load is getting distributed equally across both the links but total bandwidth utilization across both the links is not going beyond 30Mbps. The combined bandwidth of both links is 80Mbps (50+30). However links are not getting fully utilized even though heavy load is there on the links. Can you please tell me how to make full use of both the wan links at both the ends?

  • CEF and per-packet load balancing

    We have four OC3 links across the atlantic and I was looking for a solution which would allow load balacing across the four links on a per-packet basis (not session). The objective is both resiliency i.e. being able to handle link failures transparently & balancing the load across all the links. BGP multptah looked like the ideal soultion. However, I was told that the CEF packet based load balancing is no longer supported by CISCO. Is this correct ? Is it applicable for all models ? Are there any other potential solutions?
    Appreciate a response from the experts.

    Hello Rittick,
    an MPLS pseudowire will use only one link of the 4 links based on inner MPLS label, it cannot be spread over multiple parallel links.
    The MPLS pseudowire can travel within an MPLS TE LSP that can be protected by FRR.
    per packet load balancing does not apply to your scenario.
    You need to mark traffic of the critical application with an appropriate EXP settings. The EXP bits are copied to the outer (external) label.
    On the OC-3 physical interfaces you will configure a CBWFQ scheduler providing 100 Mbps of bandwidth to traffic with specific EXP marking. This is elastic and over unused links bandwidth will be left available to other traffic.
    On the LAN interface you need to mark the EXP bits in received packets using a policy-map
    access-list 101 permit tcp host x.x.x.x host y,y,y,y
    class CLASSIFY-BACKUP
    match access-group 101
    policy-map MARKER
    class CLASSIFY-BACKUP
    set mpls exp 3
    class class-default
    set mpls exp 0
    int gex/y/z
    service-policy in MARKER
    class-map BACKUP
    match mpls exp 3
    policy-map SCHED-OC3
    class BACKUP
    bandwidth 100000
    class class-default
    fair-queue
    int posx/y/z
    service-policy out SCHED-OC3
    applied on all pos interfaces.  The MPLS pseudowire will use one link only. Different pseudowires can use different OC-3 links. Load balancing of MPLS traffic is based on internal label (the VC label of the pseudowire)
    Note:
    you should check if it is possible to mark traffic received on the incoming interface of the pseudowire otherwise you need to mark IP precedence nearer to the host.
    Hope to help
    Giuseppe

  • I have a PowerPC G4, 1.5 Ghz, with 1.5 GB of ram. Currently running OSX 10.4.11.  Can I upgrade to 10.5.8 (or higher)?  Need to load new software and said that was the minumum requirement.

    I have a PowerPC G4, 1.5 Ghz, with 1.5 GB of ram.
    Currently running OSX 10.4.11. 
    Question: Can I upgrade to 10.5.8 (or higher)?  Need to load new software and said that was the minumum requirement was 10.5.8
    Thanks, WPC-2012

    Mac OS X 10.5 Leopard installation system requirements
    http://support.apple.com/kb/TA24950
    Leopard is no longer available at the Apple Store but may be available by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753).
    If you can't obtain a retail install DVD from Apple, look on eBay or Google the installer part numbers to possibly find at an on-line store. Here's what to look for:
    MB427Z/A  Leopard 10.5.1 install DVD
    MB576Z/A  Leopard 10.5.4 install DVD
    MB021Z/A  Leopard 10.5.6 install DVD (single user)
    MB022Z/A  Leopard 10.5.6 install DVD (5-user family pack)
    Installing Mac OS X 10.5 Leopard
    http://support.apple.com/kb/HT1544
    Mac OS X 10.5 Leopard Installation and Setup Guide
    http://manuals.info.apple.com/en/leopard_install-setup.pdf
    After you install the base 10.5, download & install the 10.5.8 combo update at http://support.apple.com/downloads/Mac_OS_X_10_5_8_Combo_Update
    The DVD should look like this
    Caution - Leopard does not support classic mode. So, if you currently open OS 9 apps in classic mode, you won't be able to do this if you upgrade to Leopard.
     Cheers, Tom

  • Register Applications photoshop CC   Lightroom 300 baht per month Creative Cloud desktop install and load the program into Lightroom down normally open normally, but the work load photoshop program installed. Open access Like we use it to fill a 30-day tr

    Register Applications photoshop CC   Lightroom 300 baht per month Creative Cloud desktop install and load the program into Lightroom down normally open normally, but the work load photoshop program installed. Open access Like we use it to fill a 30-day trial version, serial no.

    1) WHAT if I juse JUST ONE Adobe program pretty often? 
    They have a single use subscription for $20/mo.  Similar to upgrading extended version every 1.5 years.
    2)  WHAT if I created projects like 2 months ago and I didn't use Photoshop for a full month.  Who assures us that with the CC series the projects are opened with the old CS ones?Or don't use it every day?
    Same problem if you own it.  If upgrade price is $400 every 1.5 year that is same as $16/month.  You can choose not to update and version will be same as when you last used it.
    3) WHAT if I don't use Adobe 24/7?  and 5) Making an day-based subscription??  Same problem if you own it.  If upgrade price is $400 every 1.5 year that is same as $16/month.
    4) Adobe, do you think to be the only one making these softwares?
    Competition is always a factor in market.
    6) After all this mess, you discriminate Europeans, too?
    Taxes charged by Governments and municipalities are not controlled by Adobe.

  • BGP requirements and load sharing

    Hi !
    I have been reading memory requirements for running BGP. But, for a tipical scenario with dual ISP for load sharing which are the requirements for the router ?
    Could we use a 1841 or thinking about 37x5 or higher router ? I know that it depends on size for routing table, AS, and so on but what is the rule of thumb for choosing the correct router ?
    Thanks
    Rafa
    http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml#conf2
    Load Sharing When Dual-Homed to One Internet Service Provider (ISP) Through a Single Local Router
    http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a83.shtml
    Achieve Optimal Routing and Reduce BGP Memory Consumption

    Routes is one constraint and traffic is one more and the kind of policies i apply would be another. If i took a default from my upstream with about 1 MB of traffic, i would definitely look at 1841. If received routes ( atleast 20,000) and about 1 MB or 2 MB and 2 or more upstreams, I may even settle for a 3850.

  • TS3772 purchased video throough Itunes still says it requires Quicktime, I down load Quicktunes and it still says it is require

    I purchased a ideo throough I Tuned and i Tunes says that Quick Time is required to play it. Tried a down load and it still says it is required. Frustration...

    Can you check something for me please? I'd like to try doing a "Run as administrator" on your iTunes.
    Quit iTunes first.
    In Computer, open Local Disk C: or whichever drive you have your program files installed on.
    If you have a 32-bit Windows, open the "Program files" folder.
    If you have a 64-bit Windows, open the "Program Files (x86)" folder.
    Open the "iTunes" folder.
    Right-click on the iTunes.exe file and select "run as administrator".
    Try playing the movie now. Does it play for you without the message?

  • What does per Wlan Band select and load balancing do ?

    Good morning.....We recently upgraded our controllers from 4.2.185 to 6.0.188 and have noticed many clients having connectivity issues. We have Aggressive load balancing turned off globally but have noticed that band select and load balancing are enabled on the
    Wlan. Are these settings mutually exclusive or do they do the same thing ?  Does the Wlan setting override the default ? We have noticed that there is
    output doing "debug dot11 load-balancing"
    Thanx.....Dave

    I believe we never had load balancing turned on when running 5.2 code. We jumped from 5.2 to 6.x temporarily and then to 7.0 within a 30 day time frame this summer. We're a large university and we had very few users on WiFi during that time.
    The Macintosh laptops are having nothing but trouble since school began, and I have gone over everything and found that band select is turned on as well as load balancing. Since band select didn't exist in 5.2 (I believe) I know it wasn't on. As for load balancing, I don't believe it was on, and I discovered it was turned on when recently reviewing our configs.
    The Macintosh laptops have been debugged and our Mac gurus tell us they're getting a message that equates to "the AP is busy, or the AP is full". This leads me to believe that load balancing got turned on during the upgrade and we didn't notice, which caused the Macintoshes to have issues.
    We don't have any VoWiFi clients so we don't have to support them, and we don't officially support smartphones, either.
    I turned off load balancing and will see how it goes....
    Thanks!

  • ASA load balance per destination

    Hello,
    I have an ASA with version 8.4.4.1 connected via a switch to two routers and I have two default routes on the ASA pointing to the two routers.
    The question is : Does the ASA load balance the traffic onto the two routers per-destination or per-packet?
    As in routers, CEF load balances the connection per-destination by default. So, what about the ASA regardless of  the hardware.
    Regards,
    George

    No. Everything will go to lowest cost route. Matthew

  • Route 1811 - Reduncy - Load Balacing

    My configution today are:
    I have two external provider to conect my brach office. It are PIN (172.16.10.1) and EOT (172.16.11.1).
    I have two VLan  do InterVLAN Routing using Router on a stick  with FE1. I am using RIP protocol.
    I am using my other routing Level 3  FE2 (172.16.10.4) to conect my   provider PIN (172.16.10.1). it work beautiful.
    Now I need to create Reduncy - Load Balacing  with my other provider EOT (172.16.11.1).
    and also I need connect my intenet provider CHARTER. 68.140.200.14.
    Thanks for you help

    Samir,
    The load balancing algorithm used in CRS by default is based on L3, 3 tuple, hash.  So if you don't have enough different l3 source/destination addresses you won't see as even distribution.  Normally this is just fine.  But depending on the traffic flows you have you may need to go to L4, 7 tuple, algorithm.  This will then look deeper into the packets and use the L4 ports along with source and destinations addresses to balance out the flows.
    To change this it's global config command "cef load-balancing fields l3/l4". 
    This will change the hashing algorithm used on the linecards for load balancing. 
    Thanks,
    Bryan

  • Resources for designing redundancy and load balancing among data centers

    Hello all,
    I'm looking for resources for designing redundancy and load balancing between two physically separate data centers. I'm looking for some "best practice" links, tips, or recommendations. Any suggestions are appreciated!
    Thanks.

    I think that we can do per packet load balancing by using CEF.
    Please go to the following URL:
    http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fswtch_c/swprt1/xcfcefc.htm#xtocid5
    Also, you may need local director or distributed director. What resource/application is availalbe in the data centre? (e.g. http server, ftp server, TN3270 server, and so on)

Maybe you are looking for

  • How do I fix my iPhone 5 wifi problems with Airport Extreme?

    I have a 5th Gen Airport Extreme (AE) and an all Mac household.  We have iPhones, iPads and MacBooks.  Ever since I got the Extreme, my iPhone 5 will stop responding on the internet.  It still shows as connected, but nothing on the internet responds.

  • Failed to read data from report file Reason: The table could not be found.

    BO Enterprise XI R2, cannot publish crystal reports using the publishing wizard. Failed to read data from report file Reason: The table could not be found. Any ideas to get around this would really help out. Regards

  • More than 8 planning folders

    All - My BPS application needs to have 10-12 different planning folders.  I know if I run my tool on the web, there is no limitation to the amount of planning folders I can have but my users will run this in SAP.  Is there anyway that I can overwrite

  • TSAPI Error -17808: Wrong Number of Positional Parameters

    I am trying to determine some more details as to why I am receiving this error. The error is generated whenever I try to access any method from the TSAPI. I am passing the sequence context into a COM Automation Server, and if I attempt to call a meth

  • Moved by Moderator.

    Hi I have purchased an online number. I would like to have that number displayed as my caller ID but that number does not seem to be on my 'verified numbers' list and I cannot add it either. Can you help ?