Cisco WAN :: 886VA / Unable To Set PPP Multilink On Interface BRI0 And Dialer / IOS
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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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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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 10, 2013
We have recently deployed several Ciso 887VAW (IOS 15.1(4)M4) to customer premises and I have come to realise counters show extremely high (not at all accurate) output rate and packets on all of them. [code]
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Jun 21, 2011
I have an 837 ADSL router that the customer is upgrading from a 3 meg circuit to a 10 meg circuit.
The previous vendor used PPOE for connection and we used a dialer 1 interface to make the connection with a user name and password.
The new connection is a straight WAN DHCP no username or password needed.
I realize I can change the dialer interface from negotiate to DHCP but do I still need it ?
Can I replace the dialer 1 interface with IRB ? Should i just keep the Dialer 1 interface since the device is currently set that way and just remove the PPP negotiation from dialer 1 ?
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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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Jul 4, 2011
I have applied a crypto map (fo ipsec vpn) on the dialer interface (for PPoE connection) in Cisco 2800; every time when the router restarts the crypto map is removed from the dialer interface even though i save the configuration every tim when i apply the map on the interface. Is there any way that the crypto map remains there on the dialer interface after the restart of router.
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May 11, 2013
How to make a Cisco 881 router finally work. I have the following configuration:
Current configuration : 2964 bytes
!
! No configuration change since last restart
version 15.1
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
[code].....
As much as I understand, the VPN tunnel is active.I can access the Internet, but I cannot access anything through the VPN tunnel.
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Jan 9, 2011
having some issues with a configuration using a Dialer interface. The interface comes up and the VPN tunnel comes up, but cannot access any network resources or the Internet.
The things that concern me most are my access lists as I have the static IP address that we are assigned via PPPOE - the IP never changes, but not sure if I can define it in the ACL or if I should be using an ANY tag.
Note: I've changed some IPs and username for security reasons.
!version 15.0service tcp-keepalives-inservice tcp-keepalives-outservice timestamps debug datetime msecservice timestamps log datetime msecservice password-encryptionservice sequence-numbers!hostname C2911-OTO01!boot-start-
[Code].....
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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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Dec 6, 2012
I have two 3825's. Each has it's own ISP connection. Nat is configued for both. They have an ethernet connection between them and I'm running OSPF between the two so the routes propogate. I have qty 11 Dialer interfaces configured on each router (each router has an exact copy of the other routers dialer interface). However, I only want the Dialers up if the ISP connection on the mated router goes down. Much like HSRP I need one to preempt and be active if both ISP connections are up. When one goes down the other Dialers must come up. Each dialer sends a Dynamic DNS host name and IP address pair to DynDNS.org. So I cannot have both up otherwise the DNS names will bounce between ISP#1's IP address and ISP#2's IP address (back and forth). Let me know if any option exists to make this happen. As an aside the ISP's are providing me DHCP addresses so I cannot work off of an IP, it has to be the physical interface (i.e. Gi0/0).
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Sep 11, 2011
I have the below configurations done on a 2900 router. [code]I would like to know, if the IP address assigned to dialer1 interface "20.1.2.133" would be listed in "show arp" ?, as it failed to list on our router and I want to know if this is an expected behavior ?
Secondly, does self ping 20.1.2.133 (dialer interface IP) work ? [code]
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May 7, 2012
Is it possible to establish a interface dialer on a layar 3 switch?Or is it only interface for routers?I have a c3750 switch (WS-C3750G-24T), and when i try to establish a dialer interface i get an error message:
[code]...
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May 19, 2013
i am having cisco 881 router i want to know whether i can configure dialer interface with username and password for my dsl internet connection.
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Mar 2, 2013
i used a Cisco 886VA with Annex-B service in Germany. Now the provider has changed the DSLAM port to Annex-J but the router does not get any connection anymore.
As per Cisco homepage [URL] the router should support Annex-J in table 7:
Cisco 886VA: Optimized for Annex B; also compatible with Annex J
How to bring up the router with Annex-J service?? Is there something special i have to configure? Do i have to buy Cisco 886VA-J???
Software i have tested:
==========================================
c880data-universalk9-mz.151-4.M4.bin
c880data-universalk9-mz.153-1.T.bin
[Code].....
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Jun 25, 2011
I've bought a new Cisco 886VA and want to set the noise-margin value. With my old 876 I had to set "service internal" and then I was able to configure the value unter ATM inter config.
But with the new 886VA I can't find a way to configure it.
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Aug 8, 2011
I will install in the next days a 886VA router (VDSL over ISDN using PPoE). Since I have no possibility to verify the VDSL config, this is what i prepared. Is this config OK (only VDSL part) ?
controller vdsl 0
operating mode auto
interface Ethernet0
[ code]...
For VDSL over ISDN the interface Ethernet0 must be used instead of ATM . Is this config correct ?
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Jul 3, 2011
I'm using a Cisco 886VA connected to an ADSL2+ line. Typing "sh control vdsl 0 | inc Err" shows me the CRC errors on the line, but the CRC error counter displayed with "sh int atm 0" is empty. Also with 876 typing "sh dsl int atm 0" I can see growing error rate but "sh int atm 0" is empty.
I want to write an applet to reset the interface/controller if threshold is too high but the event interface detector won't see any errors.
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Oct 28, 2012
I'm trying to configure multicast between 2 VLANs on a Cisco 886VA running IOS 15.2 (3) T1 (advanced security). While I can set the global "ip multicast-routing" I cannot "ip pim sparse-mode" on my interfaces - ip pim is actually unknown and also doesn't appear in the interface's ip subcommand list when using "?".
The feature navigator says pim is supported on my platform and IOS version.
My config looks like this:
interface FastEthernet3
switchport access vlan 103
no ip address
[Code].....
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Mar 28, 2012
Is there a way to find in a remote branch the adsl line number in a cisco router 886VA.
When giving show controllers vdsl 0
we can see the upload/download speed but there is no information about the line number. We need this information in order to troubleshoot adsl line problems with our ISP's in remote branch offices.
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Mar 17, 2013
I want to dumb down a Cisco 886va to act as a pure vdsl bridge modem with a local ip to be able to do some admin work on the router. To some extent my config works, but i think the default vlan 1 kills my internet. When i connect the 88va the vlan bridge 7 and 8 goes up, the router behind connects via pppoe on vlan 7 but no traffic is going through. vlan 8 gets a dhcp lease for iptv and if i don´t switch the receiver on and off the traffic flows and the tv works. I am also able to connect to the local ip to access the web interface. [code]
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Apr 8, 2013
Setup:
Cisco 886VA-K9
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.2(4)M3, RELEASE SOFTWARE (fc2)
This router has two VLAN's on one Ehternet interface
VLAN1: data
VLAN2: voice
The WAN connection is a regular DSL line with PPP.
Modem FW Version: 120306_1254-4.02L.03.B2pvC035j.d23j
Modem PHY Version: B2pvC035j.d23j
Output of show interface brief:
Interface IP-Address OK? Method Status Protocol
ATM0 unassigned YES NVRAM up up
BRI0 unassigned YES NVRAM administratively down down
BRI0:1 unassigned YES unset administratively down down
[code]....
We all know you can't manage data traffic on the internet since your not in control of both sides of the link. So only queuing would not be a good practice IMHO. I was thinking on just rate-limit or police data-traffic so Voice always has bandwidth available when needed. I've did tried to rate-limit on the ATM0 interface, but no luck. Voice was still very bad.
My question is: where to rate-limit the data traffic? On the VLAN interface, the ATM interface, DIALER interface?
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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 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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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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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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Jan 6, 2011
I am having an issue with Cisco 1812j Router.
I have 2 1812j router. One router I accidentally lost the password so I reset the password as following link. [URL]
After that I could not submit "dialer" command. Like this.
c1812j-01(config)#int bri0c1812j-01(config-if)#d?dampening default delay descriptiondot1q dot1x down-when-looped dxi
c1812j-01(config-if)#
There is no choice to use "dialer" command.
The other Router is as below which looks ok.
c1812j-02(config)#int bri0c1812j-02(config-if)#d?dampening default delay descriptiondialer dialer-group dot1q dot1xdown-when-looped dxi
I guess I did something wrong to reset the unit.
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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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Sep 7, 2011
I am trying to copy a setup from a Nortel IAX100 where the carrier provides two ATM PVC's over ADSL - one for voice (VoIP) and one for data (IP). Relevant lines from the backup of the IAX's configuration include the following for the PPP authentication over the voice circuit:
<wan_8_32>
<entry1 vccId="1" conId="1" name="Voice" protocol="PPPOE" encap="LLC" firewall="enable" nat="enable" igmp="disable" vlanId="-1" service="enable" instanceId="1509949441"/>
</wan_8_32>
<pppsrv_8_32>
<ppp_conId1 userName="" password="" serviceName="" idleTimeout="0" ipExt="disable" auth="auto" useStaticIpAddr="0" localIpAddr="255.255.255.255" />
</pppsrv_8_32>
The null username and password for the PPP connection have me a bit stumped. Does the PPP connection not use any authenetication at all? (Is that possible/likely? How could I deubg it?) Or does does the IAX100 supply a chap/pap response with null credentails? (If so, how would I duplicate that using an instruction to a dialer interface?I am configuring an 877 with 12.4T and advanced IP services.
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