Multilink PPP - bouncing interface

I have two E1 connections between two routers. Unfortunately, the bundle is always going up and down. If I configure an ip subnet on each link, the connections are stable. Hence it does not look like a line problem. Or could it be that the bundle has problems with channelised E1?
Has anybody some experience with this kind of problems? Thanks for advice.
Florian

Yes Im also curious as to why the Mulitlink continues to bounce as the Carrier states they see no issues on there end..?
*Jan 2 20:27:25.497: %LINK-3-UPDOWN: Interface Multilink1, changed state to down
*Jan 2 20:27:35.445: %LINK-3-UPDOWN: Interface Multilink1, changed state to up
*Jan 2 20:28:15.585: %LINK-3-UPDOWN: Interface Multilink1, changed state to down
*Jan 2 20:28:25.589: %LINK-3-UPDOWN: Interface Multilink1, changed state to up
*Jan 3 06:27:13.111: %LINK-3-UPDOWN: Interface Multilink1, changed state to down
*Jan 3 06:27:20.083: %LINK-3-UPDOWN: Interface Multilink1, changed state to up

Similar Messages

I have asr 1000 with asr1000rp2-adventerprisek have problem when I gave PPP Multilink to the interface Dialer

Hello,
please Urgent Help
I have ASR 1000 with asr1000rp2-adventerprisek Version, when I give PPP Multilink to the dialer interface it show following error :
FMFP-3-OBJ_DWNLD_TO_CPP_FAILED: F0: fman_fp_image:
MLP bundle , link download to CPP failed
please urgent help

this error comes with the command PPP multilink, it is a lot of letters and numbers and then this last line comes this message
FMFP-3-OBJ_DWNLD_TO_CPP_FAILED: F0: fman_fp_image:
MLP bundle 181, link 178 download to CPP failed
the configuration still not installed but I configured just the following lines
interface Virtual-Template
ip unnumbered Loopback2
ip mtu 1440
ip load-sharing per-packet
ip tcp adjust-mss 1400
no logging event link-status
peer default ip address pool
ipv6 unnumbered Loopback2
ipv6 enable
no ipv6 nd suppress-ra
ppp authentication pap chap callin
ppp multilink
ppp multilink fragment delay 100
ppp multilink mrru local 1546
that were the lines used to configure this Dialer, the image must be asr1000rp2-adventerprisek and not Ipbase but I dont tried to use IPbase.
what do think ?

Multilink PPP problem

Hi Guys,
i got a situation here and hope someone will be able to help me out. Recently i configured a PPP multilink and am facing some issues after that.
Issue 1:
There seems to be lot of input error on multilink interface (150 errors in 40 mins)
Issue 2:
when any of the multilink member interface goes down (all other links are active), am getting packrt drops and request timed out when i ping my other end multi link interface atleast for some 30 sec , after which my response is ok.
About my network
I have connectivity between site A and Site B which consists of five 64 kbps Leased lines bundled together with Multilink PPP
My configuration is shown below
End A
interface multilink 1
ip address x.x.x.x x.x.x.x
ppp multilink fragment-delay 20
ppp multilink interleave
ppp multilink
multilink-group 1
int Ser 2/0
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
int Ser 2/1
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
int Ser 2/2
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
int Ser 2/3
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
int Ser 2/4
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
End B
interface multilink 1
ip address ip address x.x.x.x x.x.x.x
ppp multilink fragment-delay 20
ppp multilink interleave
ppp multilink
multilink-group 1
interface S 2/0:1
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
interface S 2/0:11
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
interface S 2/0:25
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
interface S 2/0:4
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1
interface S 2/0:6
bandwidth 64
no ip address
no ip redirects
no ip proxy-arp
encapsulation ppp
no ip route-cache
no ip mroute-cache
no fair-queue
ppp multilink
multilink-group 1

pls find the output of show command
END A #sh int multilink 5
Multilink5 is up, line protocol is up
Hardware is multilink group interface
Description: ***Multilink to End B ***
Internet address is 192.26.0.162/30
MTU 1500 bytes, BW 320 Kbit, DLY 100000 usec,
reliability 255/255, txload 2/255, rxload 1/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 2 seconds on reset
LCP Open, multilink Open
Open: IPCP, CDPCP
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 19:55:13
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2000 bits/sec, 4 packets/sec
5 minute output rate 3000 bits/sec, 4 packets/sec
309478 packets input, 58763590 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1492 input errors, 0 CRC, 1492 frame, 0 overrun, 0 ignored, 0 abort
290606 packets output, 32728691 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
END A #sh ppp multilink
Multilink5, bundle name is End B
Bundle up for 22:06:31
493 lost fragments, 162050 reordered, 0 unassigned
999 discarded, 0 lost received, 3/255 load
0xAE5E6 received sequence, 0x69F6B sent sequence
Member links: 5 active, 0 inactive (max not set, min not set)
Se2/0, since 20:07:34, last rcvd seq 0AE5E1, 160 weight, 152 frag size
Se2/2, since 20:04:45, last rcvd seq 0AE5E2, 160 weight, 152 frag size
Se2/3, since 20:04:07, last rcvd seq 0AE5E3, 160 weight, 152 frag size
Se2/5, since 20:03:24, last rcvd seq 0AE5E4, 160 weight, 152 frag size
Se2/1, since 19:57:12, last rcvd seq 0AE5E5, 160 weight, 152 frag size
Am getting 1400 input errors in last 19 hours on multilink interface, also less than 100 input errors on member serial interfacs.Also am not loosing any link member.

MultiLink PPP Processor Load

Is there a large increase in Processor Load when using MultiLink PPP to bond T1s together while running MPLS? We have been requested to bond circuits for customers, but are reluctant because of the danger of over utilizing the processor on our 7206s which are mostly NPE-400s and some NPE-G1s. Is there a reference somewhere to the increase in Processor Load caused by MPPP?

Hi,
Cisco does not publish quantitative details on the impact of MLPPP on CPU utilisation. So the best option for you is to do some baselining within the lab: start with an unloaded box with two separate T1s, pass traffic over them so that they are both fully utilised and then note CPU utilisation. Then, enable MPPP over these, pass traffic over the multilink interface so that it's fully utilised and then note CPU utilisation. That should give you some idea of the incremental impact of such interfaces. You can always do things such as disable fragmentation when using MLPPP which does reduce CPU utilisation.
Having said that, the NPE-400/NPE-g1s are pretty grunty and should be able to handle a few multilink interfaces. It comes down to how many of these interfaces you are expecting to use...
Hope that helps - pls do rate the post if it does.
Paresh

MPLS TE with Multilink PPP failed

I have a problem setting MPLS TE in multilink PPP.
I setup 2xe1 PE to P connection using multilink PPP. Configuration for MPLS TE had been completely setup.
Tunnel MPLS was terminated at interface multilink at both end and also the rsvp had been attached to these interfaces.
PE1 ==== MPLS CORE --- PE2
The configuration seems like this:
mpls traffic-eng tunnels
interface Tunnel100
ip unnumbered Loopback0
tunnel destination 103.23.4.2 tunnel mode mpls traffic-eng
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng priority 0 0
tunnel mpls traffic-eng bandwidth 100
tunnel mpls traffic-eng path-option 2 dynamic
tunnel mpls traffic-eng record-route
interface Multilink20
description MultiLink to 7513 Gandul
ip address 103.23.4.13 255.255.255.252
ip ospf authentication-key 7 xxxxx
ip ospf hello-interval 5
ip ospf dead-interval 15
mpls label protocol ldp
mpls traffic-eng tunnels
tag-switching mtu 1512
tag-switching ip
ppp multilink
ppp multilink interleave
no ppp multilink fragmentation
multilink-group 20
ip rsvp bandwidth
end
interface Serial3/0:0
no ip address
ip load-sharing per-packet
encapsulation ppp
fair-queue 64 16 48
ppp multilink
multilink-group 20
interface Serial3/1:0
no ip address
ip load-sharing per-packet
encapsulation ppp
ppp multilink
multilink-group 20
With this config the signalling stay down.
Name: PE-CLG-72_t100 (Tunnel100) Destination: 103.23.4.2
Status:
Admin: up Oper: down Path: not valid Signalling: Down
path option 2, type dynamic
Config Parameters:
Bandwidth: 100 kbps (Global) Priority: 0 0 Affinity: 0x0/0xFFFF
Metric Type: TE (default)
AutoRoute: enabled LockDown: disabled Loadshare: 100 bw-based
auto-bw: disabled
Shortest Unconstrained Path Info:
Path Weight: UNKNOWN
Explicit Route: UNKNOWN
History:
Tunnel:
Time since created: 1 hours, 4 minutes
Path Option 2:
Last Error: PCALC:: Local system ID has not been set
Thnks for any response.

hi ,
i have been troubleshooting the same issue for the last 2 days , i go the same message
*Mar 2 02:06:34.973: TE-PCALC_PATH: get_path: system_id not initialized!
R6#show mpls traffic-eng tunnels
Name: R6_t1                               (Tunnel1) Destination: 1.1.1.1
Status:
    Admin: up         Oper: down   Path: not valid   Signalling: Down
    path option 10, type dynamic
Config Parameters:
    Bandwidth: 0        kbps (Global) Priority: 7 7   Affinity: 0x0/0xFFFF
    Metric Type: TE (default)
    AutoRoute: disabled LockDown: disabled Loadshare: 0        bw-based
    auto-bw: disabled
History:
    Tunnel:
      Time since created: 1 days, 17 minutes
    Path Option 10:
      Last Error: PCALC:: Local system ID has not been set
R6#
i am using ISIS as routing protocol , I dont know if is a bug with GNS3 or something is wrong with my config wich i dont think so !!
can anybody help me please !

Transparent bridging & Multilink PPP

Is it possible to run Multilink PPP on 2 T1s while also doing transparent bridging?
If so, Do I need to put bridge-group 1 on my multilink interface?
thx

It is not clear what the original problem was or what was the solution. And I am not clear what problem you are trying to solve that leads to the question of bridging over the multi link.
If we knew more about your situation we might be able to give better advice. But I would suggest that the answer will turn out to be something close to this:
- if you want to route IP over the multilink and to bridge some other traffic that might be possible.
- if you want to bridge IP over the multilink then you can not have an IP address configured on the multilink. To bridge IP over the multilink you might need to do something like configure Integrated Routing and Bridging. In IRB you configure a virtual interface BVI and put the IP address on the BVI. then you put a bridge group on the multilink which points to the BVI. It is ugly and I would not recommend it, but I think that it might work.
HTH
Rick

Two T1 lines and multilink PPP question

We are getting an additional full T1 line from our ISP for failover and increased bandwith. Each T1 line will go to different NOCs. We decided on multilink ppp (MLPPP). Our ISP told us that traffic will be transmitted on both T1 lines. Packets from one NOC will go to the other NOC, reassembled and send to WAN. In the event one NOC fails, all traffic will go through the other one.
I understand two MLPPP lines must terminate on a single router at a single location. Is what I mentioned above possible?
I also have a 2651XM router with 256MB of memory. I need two seperate WIC CSU/DSU integrated T1 modules. Can someone recommend a model?
Thanks

The most common implementation is indeed MLPPP which terminates multiple PPP links on the same end devices. There is also an implementation of multi-chassis multilink which can terminate ppp links on separate chassis. I guess that is is possible that the chassis could be in separate NOCs. I have no experience with this implementation where the participating routers are in different NOCs, but I assume that it could work.
HTH
Rick

RAS access via multilink PPP

I need to establish RAS access to my network via an ISDN PRI line. Most users will be single POTS line users but I'll also need to allow bundled POTS line users via Microsoft multilink PPP. I'm planning to order a Cisco 2811 to handle this using a NM-1CE1T1-PRI module for the PRI and a PVDM2-24DM for the calls. Will this setup handle my requirments?

I have 20 leased line with 256 kpbs sharing on 2 E1 links on the module NM-1CE1T1-PRI (1-Port Channelized E1/T1/ISDN-PRI Network Module).
Now we are migrating those 20 line to 2 mbps leased line, i wanted to know that using PVDM can i used the existing 20 lines as backup isdn line ?
We use RAS for dialup and want to remove RAS device so my question is can i use the cards mentioned above so that 20 locations can dial in with on the present E1 card without using patton RAS?

RV320 and Multilink PPP

Has anyone attempted to achieve something like this:
On the remote site, a Cisco RV320 Router, connecting to two DrayTek Vigor120 xDSL modems through the two Gigabit WAN ports, which connect to two xDSL links.
Ignoring the Core end of the xDSL (which I can make support Multilink PPP), has anyone ever imagined/tried/succeeded to run multilink PPP originating in the RV320 router or similar ( the LAC), transiting the two xDSL links and terminating on the LNS at the Core end of the xDSL link?
Sorry its a bit off the wall, I think I may be asking a lot to make this work, but you have to try!
Thanks,
Jim

Bump!...anyone out there with ideas?
Jim

Multilink-PPP

Hi,
i want to make my Archlinux work as Multilink-PPP server.
i played with MPD http://mpd.sourceforge.net/, a FreeBSD Multilink-PPP daemon, and it was easy to let it bundle to L2TP-Connections to a single link.
But doing the same with Linux seems to be quite harder, can you help me?
The-Master

the only way that i know to set up a multilink ppp in linux is to use pppd and set the mp option in the peer file, you can probably find a lot more about it by checking the pppd man pages and you will also need to find a l2tp module for the kernel. search google for it.

Multilink PPP (MLPPP)?

I have a need for multilink PPP. I can't seem to find a way to configure this in my AEBS - is it possible?

The most common implementation is indeed MLPPP which terminates multiple PPP links on the same end devices. There is also an implementation of multi-chassis multilink which can terminate ppp links on separate chassis. I guess that is is possible that the chassis could be in separate NOCs. I have no experience with this implementation where the participating routers are in different NOCs, but I assume that it could work.
HTH
Rick

Multilink ppp and E3

my company has 3 major sites, we wish to configure channelised E3 along with multilink so that we have 3 different links to 3 different remote sites so that there traffic travels across seperatly. the 1st will have 8 E1s bundled together for one site the 2nd will have 4 E1s bundled for the 2nd destination, 2 E1s will be bundled for the last destination and the remaining 2 E1s will be used fpr back up .
Is this possible ? How? is it also version dependent i m workin on 12.2 IOS on cisco 7206 VXR. Please help urgently.
Thanks.

hi,
here you can creat three different MLPPP interface and you can add the E1 link as per your requirement to the appropriate group... so here in first MLPPP you will add 8E1
in second MLPPP you will add 4E1 and in
third you will add 2E1... and now you want to configure other two E1 for back up off all this three then you can go for Distributed MLPPP as given in the privious post...
"The Distributed Multilink Point to Point Protocol (dMLP) feature allows you to combine full or fractional T1/E1 lines in a line card (VIP, FlexWAN) on a Cisco 7500 or 7600 series router into a bundle that has the combined bandwidth of multiple links. You use a distributed MLP Bundle to do this. A user can choose the number of bundles in a router and the number of links per bundle. This allows the user to increase the bandwidth of network links beyond that of a single T1/E1 line without the need to purchase a T3 line. In non-dMLP, all of the packets are switched by the Route Processor (RP); therefore, this implementation impacts performance of the RP, with high CPU utilization for only a few T1/E1 lines running MLP. With dMLP, the total number of bundles that can be handled on the router is increased, as the data path is handled and limited by line card CPU and memory. dMLP allows you to bundle fractional T1/E1, starting from DS0 (64 Kbps) onwards."
Hope this will help you
regards
Devang

Multilink PPP bundles - "name routerX doesn't match"

Hi folks,
I'm using various 2600's with ISDN BRI's (basic-ni) dialing into a common NAS with 2 T1's (primary-dms100).
When I activate a single 2600, it will connect successfully and create an MLP bundle on the NAS using the 2600 hostname as an identifier. The problem arises when another 2600 attempts to establish a connection while an MLP bundle exists. I'm seeing the following error:
=========================================
Oct 22 12:39:30 EDT: %DIALER-6-BIND: Interface Se2/1/0:15 bound to profile Di1
Oct 22 12:39:30 EDT: %LINK-3-UPDOWN: Interface Serial2/1/0:15, changed state to up
Oct 22 12:39:31 EDT: Se2/1/0:15 MLP: Request add link to bundle
Oct 22 12:39:31 EDT: Se2/1/0:15 MLP: Adding link to bundle
Oct 22 12:39:31 EDT: Se2/1/0:15 MLP: Link unable to join bundle routerX, name routerY doesn't match
Oct 22 12:39:31 EDT: Se2/1/0:15 MLP: Link for 5555551234 not added to bundle
Oct 22 12:39:31 EDT: %DIALER-6-UNBIND: Interface Se2/1/0:15 unbound from profile Di1
=========================================
I am unsure why routerY is attempting to join routerX's bundle. It seems to me routerY should try to establish a bundle of it's own using "routerY" as an identifier.
Attached are my interface configs. If anyone can point me in the right direction here it will be appreciated. Thanks.

Hello,
my first thought would be that the Dialer 1 on your NAS does not have the 'dialer remote-name' configured and hence does not know who is connecting. Also, on your 2600, you have the 'class dialer' configured on your 2600, is that configured for callback ? Can you post that part, or better yet, the full configuration of both the NAS and the 2600 ?
Regards,
GP

Multilink PPP over Ethernet

Hi to all!
It is possible to run MLPPP over Ethernet dot1q subinterfaces?
I fact, 2 PPPoE sessions on Multilink.
On the customer site I have a 1841 with 2 ADSL WICs.
This 2 PVC's are terminated on the 7600 on 2 VLANs..
Thanks and regards,
Thomas

Hi,
thanks for post.
What are the best solution to achieve a load-balancing? I see only CEF load-balancing as solution...
Any other idea?
Thanks and regards,
Thomas

Monitoring Multilink PPP with Analyzer

I am trying to monitor MPPP link with fragmentation and interleaving
using Agilent WAN Advisor(latest v.15.0), but it seems this box can not decode fragmented PPP, so I have no visibility and right statistics of the link
and layers 3&4. Does anybody has any idea how to get this working, Agilent
Support has been not too much helpful till now.
Alternatively, does anybody knows any WAN Analyzer able to do this.
It would be also great if it would be able to decode cRTP.

I believe that sniffervoice will do this:
http://www.sniffer.com/products/sniffer-voice/default.asp?A=2
as will W&G domino:
http://www.eetchina.com/ARTICLES/2001SEP/PDF/2001SEP18_NTES_AN1734.PDF

Multilink PPP - bouncing interface

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