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]
View 1 RepliesWe are bonding two LLU DSL lines using MLP. Our LLU provider supports MLP bonding and we have a few other customers working well on Cisco 1841s, although not such high sync speed lines as this problem site.
So the lines work well with no interface errors and sync speeds are very good and evenly matched between the two lines (approx 14Mbps downstream). It's all good - it's great in fact except that it just doesn't work properly! By that I mean we're not seeing the downstream throughput we'd expect. We actually get the downstream throughput of less than a single DSL line, so about 12Mbps. Upstream bonded throughput is fine and in line with the sync speeds.
Both circuits are 'active' in the PPP multilink bundle and I see 3 sessions on our core LNS Cisco 7301 (c7301-boot-mz.124-2.T.bin) - i.e. 2x circuits + 1x bundle. We've checked the circuits individually and 'actual' throughput (using NetPerf software) is similar for both lines and in line with the sync speeds.
We are seeing quite high CPU (50%) on the Cisco 1841 (c1841-ipbasek9-mz.124-24.T1.bin) at the customer premesis, but having tested a Cisco 2951 on the customer premesis with two new HWIC-1ADSL-M cards, this is not the cause. The 2951 ran at 5% CPU whilst we experienced the same problem.
We've checked the setup of both Cisco CPE and LNS with our LLU provider and they are happy with the MLP config. They themselves have been able to bond two similarly sync'd Annex-M DSL lines and get 25Mbps throughput on a 1841.
I am looking for any PDF, recomendation, link for best approach for secondary ACS as resiliency.
View 4 Replies View RelatedI am having real problems trying to build resiliency into a hub and spoke frame relay scenario. I know the hub is a single point of failure. Is there any way to put some resilience into the network? There is 4 attached branch offices.
View 8 Replies View RelatedI have a site that is very dense, but not high throughput. I have 4x48 port switches all 3560 and 1 2851 router. The switches are pretty much full to the brim but the site is never completly lit, they just like to move around a lot. However i wanted to provide this site with as much redundnace as possible. So my first thought was to build redundant pathing with the switches so that they could loose a switch and not have a single point of failure. So therefore I built a ring. SW1 to SW2, SW2 to SW3, SW3 to SW4, SW4 to SW1. To make this even more redundant against port hardware failure, i used two uplinks for each and built an etherchannel. is it good practice to use Etherchannel and Spanning Tree together?So i now have a good redundant LAN switching topology. I have multiple VLANs at the site so I am using Rapid-PVST. I did not set priorities on the switches as I don't think that is really truly necessary, but correct me if I am wrong!Ok so next step is to make sure that my WAN connection for all of these switches is redundant. I have a 2851 router, with 1 of the built in interfaces dedicated to our ethernet hand-off WAN connection (MPLS in this case using BGP routing). The other would be used as an uplink. I also got an additional card for the Router so that i can have redudant local LAN connections. I then built up some IRB bridges so that I could uplink the Router to SW1 and SW3. Is it good practice to use IRB Bridging on a Router to provide redundancy?So at this site i have the first part running, and it works pretty well but I have had 1 strage issue, which has to do with after a failure and re-convergence of spanning-tree, it seems that DHCP starts failing to work. I actually had to go into each of my switches make a dummy VLAN interface and put on helper-addresses to get them to work. They are not L3 switches (programatically speaking) so they should just forward the broadcast packet onto the router, which DOES have the helper-addresses programmed,Also at another site I have the bridge router setup configured, just without so many switches, and no etherchannel between the switches. This seems to work flawlessly, but the site is very small so performance issues would be difficult to spot since they are just thin-clients coming back to a Citrix server over a single T1.
View 1 Replies View RelatedI work for an ISP and we are currently bonding 5x 6Mb ADSL connections for use as a wireless backhaul. We are currently using a Cisco 3725 and bonding the links via MLPPP. This set up is working fine except that we are not getting the full 30Mb on the download side. We are seeing more like 18 to 20. I am wondering if we can acheive the full speed with our current set up or will we need something different to get the job done.
View 1 Replies View RelatedDoes the new UCS hardware change anything ?Can we bundle 2 NICs somehow to get interface redundancy ?If still not possible to configure that in ACS 5 itself:Can it enentually be done on the "hardware" level within the appliance firmware (UCS BIOS) ?(RHEL would provide NIC bonding,,, unfortunately its not accessable from ACS5 CLI)
View 6 Replies View RelatedEven without Open vSwitch, and using the stock, Linux bonding module with 802.3ad mode I had the same problem.
From what I have read about bonding, it seems like if you bond (for example) 2x 1Gbit Ethernet connections on two servers (ie so both have two ports bonded), then if using something like 802.3ad, a file transfer should utilize both ports, and you should see a throughput of 2 Gbit/s. So this would be an increase in throughput and bandwidth, right?
But, what I generally see, is for any single TCP connection, only one port is ever utilized at a time.So for example if I'm SCPing a large file from server1 to server2, I generally see that the scp session is only using one interface, at 1 Gbit/s. I can then also run a second SCP session which will use the second port, and also move at 1 Gbit/s.
This would be increasing the bandwidth, but not the throughput, correct?Which of these behaviors is what I should be seeing with 802.3ad? I guess it depends on the hashing method? Is there a hashing method which will allow a single connection to be spread over two interfaces, allowing 2Gbit/s transfers?
I have a Cisco 6500 router at my POP site and I have a Cisco 2811 at the tail site. I have to bond 3 city to city T1s to make a 4.5Mg pipe between the 2 ends. How do I configure the routers to make this happen? This is a configuration example for a single T1:
POP end on 6500:
interface Serial1/0/1:0
ip address 10.125.1.1 255.255.255.248
Tail site on 2811:
interface Serial0/2/0
ip address 10.125.1.6 255.255.255.248
I have two switches (sanitized configs attached) and I am trying to bond int gi0/1 and gi0/2 between the two. Then I need int gi0/3 back to the main LAN switches. These are new Vlans created 982 and 983 for these switches. Question #1: do the configurations look correct? I haven't placed any laptops on the interfaces to test interconnectivity yet but I am wondering if it will work with no default routes.
The admin team needs these switches at location A for setup then they will be moved to Location B. The only thing that sucks for me is that the network admin before me created gateway interfaces for all the local Vlans on a main router as sub interfaces. For example, for these two subnets, I need to create subinterfaces below (at location A), which is why a gave the Vlan on the switches, ip addresses.
interface GigabitEthernet0/0.982
encapsulation dot1Q 982
ip address 10.98.2.1 255.255.255.0
ip flow ingress
no cdp enable
service-policy input mark-mplsqos-in
interface GigabitEthernet0/0.983
encapsulation dot1Q 983
ip address 10.98.3.1 255.255.255.0
ip flow ingress
no cdp enable
service-policy input mark-mplsqos-in
When I move the subnet to location B, I will also move the gateway. These two switches will be used mainly for a VMWare and HyperVisor environment so Vlan 982 is for VMA network and Vlan 983 is for management. The admin tells me the software needs to tag the packets, I am not sure if I care as the switches should handle that also.
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...
View 2 Replies View RelatedI have a project in an industrial environment which requires high speed wireless connectivity between 6 buildings,one central and five remotes.The maximum distance from the central building is 100 meters (take o look at the attachment diagram).I'm thinking of using the 1252a-n or 1262a-n access point to act as a bridge (root mode) at the central building with 3 omni antennas AIR-ANT5160V-R (6dbi) or 1 omni antenna AIR-ANTNV-R (4dbi).For the remote buildings i'm thinking of using 1252a-n or 1262a-n in work group bridge mode with 1 directional antenna AIR-ANT5160NP-R (6dbi).My questions are:
-Has anybody implemented a similar scenario,point to multipoint bridging with channel bonding at 5Ghz?
-How reliable will be the use of 1252 ap in bridge mode?
-The expected total bandwidth/throughput will be 300/150mbps,so theoritical every bridge will have 60/30mbps available bandwidth/throughput?
-Which antenna model do you suggest fot the central building?
we have currently a configuration with 3 bonded (link aggregation) channels, each delivering 1 Gb/s uplink, providing a total of 3 Gb/s uplink. Due to a recent network upgrade, we can now add more channels to the same group in order to have a total of 9 Gb/s uplink, meaning that we should bond toegether 9 channels. When we tried to change the old configuration in order to include six new channels to the bondend group we noticed 2 things: one channel was left in standby (blinking orange led),no increase in the uplink bandwidth semmed to happen,By looking around it looks like the channel group is limited to a maximum of 8 channels [*].
View 2 Replies View RelatedI 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)
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).
View 1 Replies View RelatedI 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.
View 1 Replies View RelatedCustomer 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.
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]....
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.
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)
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]....
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.
View 3 Replies View RelatedWe 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]....
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].....
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]....
I have a 2911 with a Vwic2 T1 card on the remote end going to a 7206 with a PA-MC-TE1, basically 8 T1 cards. Anyway I will be ordering two point to point T1 lines and since I want it to look like 3 Meg I was thinking of bonding them. Is that still the best way to set this up? If so any concerns about setup?
View 2 Replies View RelatedI am putting an pre-labbed DMVPN Hub config onto a production 1841. We had to upgrade the IOS to support protection with NAT so the current IOS we're running is c1841-adventerprisek9-mz.124-25g.bin.I can paste the configuration in fine (via the tunnel interfaces) and the router accepts it however the 'show dmvpn', 'debug dmvpn' and other related commands don't work. I have checked the IOS feature navigator and it definitely shows that DMVPN phase 1 and 2 are supported in this image.
View 5 Replies View RelatedI have a 1841 router and I can ping the f/0 port from my pc. However when i try to console to it, it is not showing up anything but a blinking cursor. I tried all different baud rates on my teraterm but still not luck. I picked the baud rate disconnected and reconnected everytime and still nothing. Then I tried to telnet to it using teraterm but it would just open a console window and then close.
View 10 Replies View Relateda have a router CISCO 1841 and I configured a NAT inside from the router to the firewall like this :ip nat inside source static firewall_adresse public_adresse and its work fine and when a added it I do this command "wr" to save the configuration and I restarted the router many times and it still work fine,but in the last five months this NAT does not exsit twice and I must add it a gain.
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View 4 Replies View RelatedWe have an MPLS that connects our main office with our 7 branch offices. We have 3Mb coming into the main office and 1.5 into all of the branch offices. I would like to give rdp traffic the highest priority. We have a Cisco 1841 at all branches and a Cisco 2811 at the main office. Do I have to configure QOS on all routers or just the one at the main location?
View 5 Replies View RelatedI have a cisco 1841 router and want to run BFD i think it needs IOS 12.4T..It has currently 12.4 but no T does the "T" IOS have mroe features?
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