Cisco WAN :: 2961 - Multilink Frame And Abort Errors On 4 Data T1 Bundle?
Jan 5, 2011
We have 4 data T1s providing our office with 6Mbs of internet bandwidth.I have been trying to track down the reason(s) for the steadily increasing frame and abort errors on the Multilink interface of our new router.We have a new 2961 with 2 2 port T1 interface cards (VWIC2-2MFT-T1/E1).
At first it looked like the T1s were completely clean, but after diving down a bit the last of the 4 T1s does appear to have a decent amount of slip and error seconds.Is that something that would cause the Multilink interface to show input, frame, and abort errors?Any config or debug commands I should start with to narrow down what might be causing this problem?
Config snippets:
card type t1 0 0card type t1 0 1!controller T1 0/0/0clock source internalcablelength short 440channel-group 0 timeslots 1-24description HCFD-XXXXXX!controller T1 0/0/1clock source internalcablelength short 440channel-group 0 timeslots 1-24description HCFD-XXXXXX!controller T1 0/1/0clock source internalcablelength short 440channel-group 0 timeslots 1-24description HCFD-XXXXXX!controller T1 0/1/1clock source internalcablelength short 440channel-group 0 timeslots 1-24description HCFD-XXXXXX!interface Multilink1ip address X.X.X.X 255.255.255.252ip nat outsideip virtual-reassemblyppp multilinkppp multilink group 1ppp multilink fragment disable!interface Serial0/0/0:0description T1 : HCFD-XXXXXXno ip addressencapsulation pppppp
[code]....
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May 11, 2012
I'm reading this definition in the cisco T-shoot student guide:
"Align-Err: this is the number of frames with alignment errors, which are frames that do not end with an even number of octets and have a bad cyclic redundancy check"
I don't understand what "frames that do not end with an even number of octets" actually means. Did they mean even number of bits? or does a frame's lenght need to be an even number for it to be considered valid?
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Sep 23, 2012
I'm configuring a 2 PowerConnect in stack mode. I can't seem to resolve this error - Recieved Frame Check Sequence Errors.Both stacks are in the lastest firmware version 3.3.4.1. Physical connections are tight.
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Apr 23, 2013
Network is 10.254.0.0/16
snag.gy/3Y8aN.jpg This is the network image.
This is my subnetted connections: http:[url]....
I can ping R2 to R5 but not R5 to R2. I have spent about 10 hours going through my network and code to no avail. I think it is the frame relay that's causing the error but not sure.. I just checked and I think R6 and R5 are not getting their OSPF updates by trying show ip route
Here are my configs: http:[url]....
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Feb 9, 2013
Ether channel: Cisco documents say Cisco uses proprietary hashing algorithm to compute a binary pattern that selects a link in the bundle. For example below a 2961 router with a switch module " NM-16ESW" performs" XOR" operation to compute the binary value to select a link.
R1#show ether channel load-balance Po1 ---> Source XOR Destination IP address.
1)Would you guys share the output " show ether channel load-balance" on your platforms?( i just want to see how different platform support different algorithm besides xor). Layer 3 ether channel on a sw.
On router, we first create ether channel and then assign int into port channel. Suppose we have a layer 3 switch and we want to put ports f1/1-2 in port channel 1. Can i configure like this: sw(con) int range f1/1-2 no switch port
channel-group 1 mode desirable. Or we must create a port channel just like we do on router and then assign ports to port channel?
Backbone fast: Suppose we have a switch with three ports, f1/1.f1/2.f1/3.
f1/1 ( root port)
f1/2( blocking)
f1/3 ( designated port).
Backbone fast is enabled on our network. Suppose sw receives a inferior bpdu on its current root port f1/1. Sw sends out RLQ on its designated port(f1/2) and Blocked port (f1/3). Suppose sw receives the rlq reply on its designated port ( f1/2). What will sw do? Will it expire the max-age timer on its root port ( f1/1) or will sw wait for all the rlq responses then expire the max-age timer on its root port ( f1/1) ?
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Apr 11, 2013
I have an installation of a new SMU on an ASR9k. Unfortunately, a previous install from a remote FTP source has stalled at 1%. The router is currently running v4.2.1, and the stalled installation was for a 4.2.0 SMU.
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Jan 23, 2012
So, I made the fatal mistake while consoled in to do a "Show Run". Now, it is just stuck in that cycle. I tried the usual "Ctrl+Shift+6" command, and even the "Ctrl+6" with no success.
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Sep 13, 2011
I have a AIR-AP1121G-A-K9 running c1100-k9w7-tar.123-7.JA2 (Autonomous)We have monitoring setup with Orion NPM and we consistently see output errors, Transmit discards and big buffer errors The users at the site have not reporting any issues but was wondering how to prevent these or are these normal?What causes the output errors on Wireless Radio ? How to troubleshoot further ?
Radio0-802.11G
Total Output Errors 0 47749
Small Buffer Misses
4 misses
139 misses
[code]....
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Feb 26, 2006
I have three E1 as a part of Multilink group. If any one goes down. loadbalancing between the rest of the two E1 does not work...
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Mar 7, 2012
I have a Cisco 1841,c1841-ipbase-mz.124-20.T4.bin, with 2x HWIC-1ADSL-M.I have managed to bond 2x DSL with PPP multlink with the config below and traffic is being sent equally across both DSL circuits. However if i disconnect either of the DSL cables connectivity fails. I was expecting connectivity to continue to work just over the one circuit. [code]
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Jun 15, 2011
I think I have my PPP multilink setup correctly. Though I am getting AL lights on one of my connections via a VWIC2-2MFT-T1/E1 card. One AL light is on at each location. Though I checked with my ISP and they said it was my network cables as everything looked good on their end. Currently one T1 circuit is connected at each end so users do not see a disruption. This is a new install with two routers and the config is shown below.
Router 1-----
controller T1 0/0/0
cablelength long 0db
channel-group 0 timeslots 1-24
(code)
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Feb 18, 2013
I have a Cisco 2821 with two serial interfaces bundled using PPP multilink. I want to monitor traffic flow (net flow) on the multilink interface. I have tried configuring ip route-cache flow/ ip flow ingress / egress but no luck.The other thing is when I do sh ip cache flow I guess I should see the multilink interface in both Source and destination columns which is not happening (not showing in destination column).The other router with same config but with ATM sub-interface working properly (same IOS). Are there any hits on this ? Also, is it possible to use SPAN feature ? The monitoring server is at some other site (coming via WAN).
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Feb 6, 2013
I have two Cisco Routers 3800 series for my internet traffic (2 ISP). I configure HSRP on the interfaces gigabitethernet and at the main router I put the multilink interface to track. When the connection drops to the main router traffic does not switch on my second router.
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Apr 3, 2003
Customer site connected to a PE using 2 x E1 circuits aggregated using Multilink PPP. The CE is a 1760, and the PE is a 7206. This is the customer HQ site.
Connected to the same PE are three other sites from the same customer. Each is connected with a single E1, again each CE is a 1760.
During some testing the customer did some large file transfers concurrently from each of the three remote sites into the HQ, so we had data coming into the PE via the three E1's (6Mbps) and then being routed onto the 4 Mbps Multilink PPP interface into the HQ, which is a potential bottleneck. This test failed miserably with packets being dropped on the output interface on the PE facing the HQ.
But then if Multilink PPP encap is removed, and we just connect the HQ using one E1 with HDLC encapsulation, the test works, even though we have half the bandwidth to the HQ, so an even greater potential bottleneck.
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Jul 18, 2011
I am looking for any other compression methods I can use for my PPP multilink connection. The PPP multilink compression is composed of two T1 lines. There are no slip sec errors or packet errors that I saw recently. R1 is a 1911 and R2 is a 2911.
R1 sh compress:
Multilink1
Software compression enabled
uncompressed bytes xmt/rcv 184340310/27355186
compressed bytes xmt/rcv 126395743/14139585
Compressed bytes sent: 126395743 bytes 774 Kbits/sec ratio: 1.458
[code]....
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Oct 16, 2011
I have a question regarding mlppp and bonding mpls T1 circuits. For the longest time we have been able to get by on one T1 circuit coming into our 3845 router. Well this T1 has now become congested and they are wanting to add bandwidth to this T1. We connect to the phone company via an MPLS T1 currently. So now it appears as though we are going to purchase another MPLS T1 circuit and bond the two T1's together. The way our network is currently set up, we utilize the same AS number on all of our remote routers regardless of location. Keep in mind I don't have any sort of mlppp set up at this moment, so unfortunately I can't post any configs. I'm just questioning the design portion and how to go about doing this.
Here is where my dilemma begins........
For every MPLS circuit we order on the remote end, we specifiy an IP for the remote router itself and one for the provider to assign to their equipment (the bgp neighbor statements). Now granted i'm no BGP extraordinaire, not even a novice really, but I don't understand how I am going to bring two T1 circuits into the same router (basically with 2 pairs of IP's). In order to bond the two T1's together, i'll need to create a multilink interface and assign an IP to that, but yet I still have 2 SETS of ip addresses. And if that isn't enough of a dilemma, I also need to spedify a neighbor statement in order for my AS to bind to the adjacent provider AS, but yet I have two IP addresses for that as well.
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Feb 14, 2012
MPLS customer with 4 T1s in a multilink. If one of the T1s drops there is a brief delay in traffic picking back up and I actually lose packets from premise back to CO. You can see this loss both with pinging across the circuit and with techs on either end running JPerf. It can take as long as 6 seconds for the reconvergence to actually happen on the multilink and traffic picks back up. In my experience this is normal behavior for Mulitlinks
I'd also like to note that it is indeed much quicker reconvergence when you physically pull the T1, any of the T1s, rather than administratively shutting down one of them and I understand that the hardware is quicker than software and that's a good thing, obviously. I've tried this with and without ppp mulitlink fragment disabled on either end and every other combo between the two. Each of the 4 serial interfaces are on line timing and I tried free-running just on the off chance that it could imrpove the loss, but it gets worse.....back to line timing. I've even tried this on other CPE platforms like two different versions of Adtran CPEs and I get the same thing. Currently I have a new 2821 CPE in place and still get the same thing. Still see a brief amount of traffic loss up to 6-7 seconds or so at times.
7600 side:
interface Multilink592
ip vrf forwarding ******************
ip address *************************
load-interval 30
no peer neighbor-route
ppp multilink
ppp multilink group 592
ppp multilink fragment disable
no cdp enable
service-policy output VPN-TEMPLATE-2(code)
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Oct 15, 2012
I am configuring ISDN Interface on 2 Cisco 886VA Version 15.2(3)T . I am unable to set ppp multilink on the BRI0 interface and on the dialer interface. It's like the command doen't exist anymore.How can I fix that so that i can have 128 K bandwidth between ma 2 sites ?.
Router1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#int bri0
Router1P(config-if)#ppp multilink
[code]....
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May 8, 2012
I have configured multicast (ip pim dense-mode) on two 2911 routers that are connected by a Multilink (3Mbps) Wan connection.The configuration work fine for awhile and sometimes all day but at some point one of the Multilink interfaces stop passing multicast traffic.I perform a sh multilink 1 on the interfaces and one interfaces show the multicast packets incrementing and the other does not, it just stops.The only fix for this is to hard reboot both routers and the multicast traffic begins to flow once again.
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Nov 1, 2011
I just finished setting up a bundle of (2) T1's in a multilink bundle and I'm having issues with one of the T1's not wanting to join the bundle.
The router I'm using on the remote office location is a 3620 router running code c3620-i-mz.121-1c.bin
The campus router which is a 7206 is setup the same exact way with multilink 240 and like I've said, serial 0/0 is joined to the bundle just fine, so we are running off one T1 connection.
The serial interface that is not working is: serial 0/1
Here is a show-run:
interface Multilink240
ip address 172.18.xxx.xxx 255.255.255.252
ip route-cache flow
ip ospf network point-to-point
service-policy output PhonesFirst
ppp multilink
[code].....
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Nov 8, 2010
I have a new fresh 5508 release 7.0.98.0 When I try to download (I mean upload to the controller) a customized Webauth bundle in .tar format I have the following message error in the syslog :*TransferTask: Oct 29 12:56:08.894: %UPDATE-3-UNTAR_CMD_FAIL: updcode.c:2832 Error during untar of webauth bundle. Tar returned 256.
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Oct 2, 2012
I have been given a task to upgrade 8T1's bundle to DS3 Fractional circuit. We are currently using 2821 router with 4 VWIC-2MFT. What card/module I need to order for upgrading to fractional DS3. Also are there any compatability issues with ISP or local router.
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Sep 8, 2011
how can i remove webauth files from WLC?I have few versions of login.tar file used for web-authentication. After uploading a new login.tar file, the wlc still show old webauth bundle files. I tried to remove customized webauth login from wireless LAN, issue clear webauth-bundle and show>custom-web webauth-bundle WebAuth Bundle does not contain any files but when i upload new login.tar that does not include files from previous login.tar, i still get the old webauth. Is it possible to delete extracted webauth files from the controller using CLI?
WLC is running 7.0.116.0 code.
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Jun 16, 2012
What is the command that can show the ACE Bundle (Like: ACE-4710-02-K9, ACE-4710-04-K9). We have ordered one ACE with 4G BW, and another one with 2G BW. But nothing shows this fact using "show hardware" and "show inventory" commands !
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Dec 22, 2010
I need to understand security bundles. I purchased a Cisco Security Bundle, Advanced Security, 64F/256D. part number CISCO3825-SEC/K9. My expectation from this device was that I will get an IOS based firewall with no need for an additional firewall module. however, the supplier is telling me that I have to buy a firewall module to use the feature. Isn't the bundle supposed to come with all I needed since is a bundle?
Is there any command I can use to verify if this device is really what I paid for? what can can I check for in the sh inv and sh ver commands? I don't see any information from these commands.
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Feb 2, 2011
To understand and configuring VPN setup to give secure access to my DB & Application Server exist in my Datacenter, to other Service Provider organisation. They need to access those DB & Application Server sitting at their company LAN itself.
My DC Setup :-
1. Core Router 7609 with SPA-IPSEC-SSC400-1 ( Cisco 6500/7600 IPSec VPN SPA Bundle 1 )
2. Core Switch 6513 with FWSM, ACE, SVC ( Network Analyser ), SUP 720
3. Distribution 6509 SUP 720
All the DB & Application Server connected to Distribution Switch in various VLAN,The Server support team from another company need the access to those, for that we will take MPLS link connecting out Core Router.
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Jun 11, 2012
One of my customer has raised a new requirement for implementation of short sequence number format support in PPP multilink header for Cisco MWR 2941 E1/T1 serial interface, whereas router is supporting long sequence number format.here is the output of "debug ppp negotiation" command:-Currently in the MWR debugging logs we can see that by default MWR is sending long sequence header format as below
*Mar 13 01:32:55.438: Se0/2:0 LCP: O CONFREQ [REQsent] id 238 len 25
*Mar 13 01:32:55.438: Se0/2:0 LCP: MagicNumber 0x26CDF693 (0x050626CDF693)
*Mar 13 01:32:55.438: Se0/2:0 LCP: MRRU 1500 (0x110405DC)
*Mar 13 01:32:55.438: Se0/2:0 LCP: EndpointDisc 2 16.16.16.11 (0x1307021010100B)
*Mar 13 01:32:55.438: Se0/2:0 LCP: MultilinkHdrFmt seq long classes 2 (0x1B040202)
While as per the requirement PPP multilink header should support short sequence.
MWR configuration:
controller E1 0/2
framing NO-CRC4
clock source line
channel-group 0 timeslots 1-31
[code]....
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Jan 9, 2011
I'm going to be wiring a new (to me) house with a couple cat 6 runs to each room. The runs will all be brought back to an enclosed 6u rack and cat 6 110 style patch panel. This rack will contain:
- HP 2824 Switch
- PfSense router (Supermicro X7SPA-HF ITX board)
- DSL modem
Since the rack is completely metal and enclosed I'm going to put my Netgear WNDR3700 WiFi router (used as an access point only) on top of the rack. My question is, what the implications are in regards to placing a WiFi device right next to a bundle of ethernet cables?
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May 8, 2012
We have ordered the following 10 line items , but only got 3 licenses , unless the 3 licenses somehow have all the licenses integrated into the 3 part numbers below, but I suspect not.
Licenses attached from Cisco:-
N7K-C7009-XL-SBUN Nexus 7009 Scalable Feature License x 1
N7K-C7009-SBUN-P1 Inc LAN,ADV,TRS,EL2,DCNM,DCNMSAN,MPLS,SAN,XL -Promotion x 1
[Code].....
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May 19, 2012
Recectly we replaced Cisco 2100 Series LAN controller to Cisco 5508 Wirless LAN controller , I downloaded WebAuth Bundle from my Old LAN Controller ,when i am trying to upload to my New Wireless LAN controller ,its not uploading and also it gave me uploading failure error message .
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May 30, 2012
I am trying to upload a customized web-auth bundle to a WLC 5508 and having some issues.I have downloaded the web-auth bundle from Cisco and used this as a template to create the web pages.I seem to recall that there is only a couple of Windows tools that you can use to TAR the file such as TUGZIP and IZARC. Anyway I have tried both and I still cannot get the file to extract. I have tried to strip the file out so that I only send up the login.html page and even this does not work.I am using a software release 7.0.220.0.
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Dec 21, 2011
I'm trying to replace a ASA 5505 with a Cisco 2801 w/ security bundle.I have gone through a pretty basic set up of configuring what I could and letting the Cisco Config Prof do the security audit to lock it down. I have everything working just fine except for the bandwidth.
As soon as I plug the router in it seems to give all the bandwidth to one computer and the rest of the campus slows down to a crawl.I turned on "fair-queue" and even tried the QoS wizard in CCP, but it seems like thats if you want to prioritize voice over data - which we aren't running VOIP so I don't need.
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Jul 26, 2011
I have in the past downloaded the webauth bundle to a wlc 5508 running 7.0.98 successfully. I am trying to upload a new bundle after modifying the AUP but I get an error after the download to the wlc.
The error with FTP or TFTP is
% Error: Webauth Bundle file transfer failed - Unknown error - refer to log
I've tried to copy the unmodified bundle from the zip and get the same error so I don't think it's the login.tar file.
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