Prefix FEC advertised over targeted LDP session

I am doing MPLS L2VPN interop testing with foundry XMR, IOS establishes the targeted LDP session with XMR fine and VC FECs are exchanged. However, I noticed that IOS is also advertising prefix-FEC mappings to XMR. This is puzzling me, since there is no directly link between Cisco and XMR, LDP does not have a link neighborship between Cisco and XMR, why would IOS advertise prefix-FEC? IOS should know that the lables it advertises are never going to be used by a targeted peer. The targeted LDP session is meant for VC-FEC mapping exchange only.
XMR only advertises VC-FEC over this targeted LDP session unless link-hello is also heard from its peer, in which case, both prefix-fec and VC-fec are advertised

Jian,
This is the default behavior indeed and shouldn't cause any issue beyond the extra labels installed in the LIB.
You can easily change that behavior if you desire so by applying label filtering as follow:
no mpls ldp advertise-labels
mpls ldp advertise-labels for 1 to 2
access-list 1 permit any
access-list 2 deny
access-list 2 permit any
Hope this helps,

Similar Messages

Targetted LDP Session

Hi,
I have scenario on targetted LDP session as follow
R1-----R2-----R3----R4
The interfaces of the routers are not enabled with mpls. If I configure targetted ldp on router R1 to R4, and i create the vrf and distributed the vpn routes via MP-BGP on both routers. Can I do vrf ping from each vrf on both routers ? I think it wont work because mpls will be failed to be routed on R2 and R3. is this correct ?
anyone can advise me ?
regards
-santo-

Hi,
MPLS must be enabled on forwarding plane for end to end ping, otherwise you can use MPLSoverGRE to make it functional in your scenario.
Yasir

How to do targetted LDP session on MPLS?

Hi All,
I need to configure targetted LDP on my PE router. Can you please help me on this?
Thank you,
siva

HI Siva,
Sample Config with N/W eg:
PE3 ----> P ----> PE4
PE3:
mpls ldp neighbor 172.16.0.4 targeted ldp
PE4:
mpls ldp neighbor 172.16.0.3 targeted ldp
1) Before the 'config' ensure the IGP reach ability between PE3-PE4 is Up & Running.
2) LDP between PE3-P & P-PE4 is Up & Running.
Please see below some show output after successful configuration:
From PE3:
PE3#sh mpls ldp nei
Peer LDP Ident: 172.16.0.4:0; Local LDP Ident 172.16.0.3:0
TCP connection: 172.16.0.4.35909 - 172.16.0.3.646
State: Oper; Msgs sent/rcvd: 37/36; Downstream
Up time: 00:00:10
LDP discovery sources:
Targeted Hello 172.16.0.3 -> 172.16.0.4, active, passive
Addresses bound to peer LDP Ident:
172.16.34.2 172.16.0.4 172.16.46.1 172.16.11.1
172.16.4.1
From PE4:
Peer LDP Ident: 172.16.0.3:0; Local LDP Ident 172.16.0.4:0
TCP connection: 172.16.0.3.646 - 172.16.0.4.35909
State: Oper; Msgs sent/rcvd: 38/41; Downstream
Up time: 00:02:34
LDP discovery sources:
Targeted Hello 172.16.0.4 -> 172.16.0.3, active, passive
Addresses bound to peer LDP Ident:
172.16.0.3 172.16.34.1 172.16.36.1 172.16.10.1
172.16.3.1
Hope I am Informative, Pls Rate if HELPS
Best Regards,
Guru Prasad R.

Cannot establish LDP session with a VRF neighbor

I have been working on a lab scenario and I cannot get my LDP session to establish between 2 7200's running 12.2(29). Looks like the hellos are being sent and received, but something isn't right with the proccessing. When I do a "debug mpls ldp messages" I see my hello's sent/received on both peers(the one with vrf on the interface and the one without) However when I use the "debug mpls ldp session io" on my vrf router, I do not see the keepalives coming from the non vrf peer. So after 3 minutes the session times out and LDP neighbor goes down and back up. Now if I take off the "ip vrf forwarding AS1" command the peer work fine. It appears its something with the processing when the vrf is configured on the interface. I have tried hard coding the LDP to the loopback and gave both routers static routes to the loopback. The discovery looks ok as well as the show LDP neighbor. I also have 2 3640's running 12.3(14)T and they run fine with this config. I want to move on but following labs have the same type of configuration.

OK the cef table and mpls Rack1R2#sh ip cef vrf AS1
Prefix Next Hop 0.0.0.0/32 receive
150.1.1.1/32 150.1.12.1 150.1.3.3/32 150.1.12.1 150.1.5.5/32 150.1.24.4 150.1.6.6/32 150.1.24.4 150.1.12.0/24 attached 150.1.12.0/32 receive
150.1.12.2/32 receive
150.1.12.255/32 receive
150.1.13.0/24 150.1.12.1 150.1.45.0/24 150.1.24.4 150.1.56.0/24 150.1.24.4 224.0.0.0/4 drop
224.0.0.0/24 receive
255.255.255.255/32 receive
Rack1R2#sh mpl
Rack1R2#sh mpls fo
Rack1R2#sh mpls forwarding-table
Local Outgoing Prefix Label Label or VC or Tunnel Id 16 Pop Label 150.1.1.1/32 0 17 Pop Label 150.1.12.1/32 0 18 Pop Label 150.1.4.4/32 0 19 Pop Label 150.1.1.1/32[V] 0 20 19 150.1.3.3/32[V] 457 21 Pop Label 150.1.12.0/24[V] 0 22 Pop Label 150.1.13.0/24[V] 0 23 18 150.1.5.5/32[V] 0 24 25 150.1.6.6/32[V] 0 25 19 150.1.45.0/24[V] 0 26 20 150.1.56.0/24[V] 0 forwarding table turned out to be hardware. I swapped the port from the fa0/0 on the NPE to eth 3/0 on one of the cards and its fine. Don't know what made me try that. Thanks for all the help with this one, I am about half way through WKBK1 and I still have all of the labs left in WKB2 so I am sure i will get stuck again. What a PITA!!
Interface
Serial1/0.1
Serial1/0.1
Ethernet3/0
Ethernet3/0
Serial1/0.1
Serial1/0.1
Ethernet3/0
Ethernet3/0
Bytes Label Outgoing Next Hop
Switched interface
Se1/0.1 point2point
Se1/0.1 point2point
Et3/0 150.1.24.4
Se1/0.1 point2point
Se1/0.1 point2point
Se1/0.1 point2point
Se1/0.1 point2point
Et3/0 150.1.24.4
Et3/0 150.1.24.4
Et3/0 150.1.24.4
Et3/0 150.1.24.4

LDP session flapping

Hi,
I have experienced problem on an ASR 1000 router with MPLS over DMVPN, whose LDP session is flapping periodically aproximatelly every 3 minutes.
The router is a DMVPN spoke with software 3.7S4. On central site, I have an ASR 1000 DMVPN hub router with 3.7S1 software
The spoke router-id i(tied to loopback0) is 10.100.249.24, hub router-id is 10.100.255.110.
We run OSPF on the tunnel interface and the ospf neighborship is up and running - no flaps, no problems on that side.
Here are the spoke periodical logs:
012742: Dec 2 11:53:41.518 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is UP
012743: Dec 2 11:56:29.734 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is DOWN (Received error notification from peer: KeepAlive expired)
012744: Dec 2 11:56:37.534 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is UP
012745: Dec 2 11:59:32.481 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is DOWN (Received error notification from peer: KeepAlive expired)
012746: Dec 2 11:59:36.265 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (3) is UP
012747: Dec 2 12:02:34.577 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (3) is DOWN (Received error notification from peer: KeepAlive expired)
012748: Dec 2 12:02:37.831 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is UP
012749: Dec 2 12:05:37.821 MET: %LDP-5-NBRCHG: LDP Neighbor 10.100.255.110:0 (1) is DOWN (Received error notification from peer: KeepAlive expired)
.... And so on.
The central router probably really doesn't receive the LDP keepalives:
0cc1-r1#sh mpls ldp nei 10.100.249.24
    Peer LDP Ident: 10.100.249.24:0; Local LDP Ident 10.100.255.110:0
        TCP connection: 10.100.249.24.646 - 10.100.255.110.28800
        State: Oper; Msgs sent/rcvd: 1352/2; Downstream
        Up time: 00:01:03
        LDP discovery sources:
          Tunnel20, Src IP addr: 10.100.237.23
The strange thing is, that there are more than 27 routers (mix of 7200, ASR 1000, ISR) connected to the central site, but just this one is having problems. I have compared the configs and didn't find any difference. I tried to shut - no shut tunnel, no change in behaviour.
The strangest thing is, that the problem has dissapeared for some 3 weeks without any reason, but has reappeared after the DMVPN tunnel interface went down and up recently.
Has anyone ever experieced this as well?
What might be the cause?
Do you have any clue where to look for troubleshooting?
Thanks,
Alexander

Hi Alexander,
I had a similar problem with LDP, but not used DMVPN.
May be issue in MSS.
Can you capture traffic on the interface on the central and the spoke routers.
Thanks,
Alex

Persist Database connection over user's session

On portal 3.0.9 with JPDK v1 I have a web provider that has a jsp portlet. The portlet has multiple pages which are navigated useing a parameter specified with the pageParameterName tag in the provider.xml. Each page needs to be able to access the database and to allow a rollback for all a users actions until a certain page is visited I need a way for all the access to be done through one database connection.
Putting the dbOpen tag in the event:session_OnStart tag of my globals.jsa file doesn't work (I'm not sure the event:session_OnStart is even executed) and trying to create the connection once with the scope="session" creates an error. Any help would be appreciated.

Generally speaking, persisting a connection over a users session is a BAD idea. If you really need to do it you simply be able to add the Connection object to the session. However, I would strongly recommend that you review your model because it will not scale.

LDP session flap on a 7600 router

Hi guys,,
Please refer below the brief intro to the problem:
LDP neighbor went down [as seen in the below logs] for around few secs between below mentioned PE device to the two uplinks P devices.
Please refer to the note detail Topology:
PE[tE x/0/0] -------- TE Tunnel ------ P Device @ A location
    [Te y/0/0] ------ TE Tunnel-------- P Device @ B location
#Show logs
917597: Mar 8 08:10:09 SAST: %LDP-5-NBRCHG: LDP Neighbor a.b.c.d:0 (5) is DOWN (TCP
connection closed by peer)
917664: Mar 8 08:10:19 SAST: %LDP-5-NBRCHG: LDP Neighbor e.f.g.h:0 (1) is DOWN
(Session KeepAlive Timer expired)
917701: Mar 8 08:10:21 SAST: %LDP-5-NBRCHG: LDP Neighbor a.b.c.d:0 (5) is UP
917771: Mar 8 08:10:23 SAST: %LDP-5-NBRCHG: LDP Neighbor e.f.g.h:0 (7) is UP
Please anybody can tell what was the reason behind the LDP flap?
Regards
Pradip

Hi Vinit,
Please find below the o/p of both show ibc & show int:
# show ibc
Interface information:
        Interface IBC0/0(idb 0x1D224BF0)
        5 minute rx rate 390000 bits/sec, 470 packets/sec
        5 minute tx rate 724000 bits/sec, 696 packets/sec
        1227785718 packets input, 132277835813 bytes
        531848764 broadcasts received
        703054986 packets output, 89510912001 bytes
        53000709 broadcasts sent
        0 Bridge Packet loopback drops
        386955797 Packets CEF Switched, 58076 Packets Fast Switched
        0 Packets SLB Switched, 0 Packets CWAN Switched
        Label switched pkts dropped: 0    Pkts dropped during dma: 219471401
        Invalid pkts dropped: 57811    Pkts dropped(not cwan consumed): 8925
        Xconnect pkts processed: 0, dropped: 1111508
        Xconnect pkt reflection drops: 0
        Total paks copied for process level 0
        Total short paks sent in route cache 78654011
        Total throttle drops 218301133    Input queue drops 773327
        total spd packets classified (456244739 low, 359912505 medium, 20316995 high)
        total spd packets dropped (153503515 low, 65948095 medium, 41 high)
        spd prio pkts allowed in due to selective throttling (0 med, 0 high)
        IBC resets   = 1; last at 05:12:26.831 SAST Wed Feb 8 2012
Driver Level Counters: (Cumulative, Zeroed only at Reset)
          Frames          Bytes
Rx(0)   368004372       1762711303
Rx(1)   913412478       2159603712
Tx(0)   728948380       3037780905
Input Drop Frame Count
     Rx0 = 22141            Rx1 = 996745
Per Queue Receive Errors:
     FRME   OFLW   BUFE   NOENP DISCRD DISABLE BADCOUNT
Rx0 0      0      0      0      0        0    0
Rx1 0      0      0      68     0        0    0
Tx Errors/State:
   One Collision Error   = 0            More Collisions       = 0
   No Encap Error        = 0            Deferred Error        = 0
   Loss Carrier Error    = 0            Late Collision Error = 0
   Excessive Collisions = 0            Buffer Error          = 0
   Tx Freeze Count       = 0            Tx Intrpt Serv timeout= 1
Counters collected at Idb:
   Is input throttled    = 0            Throttle Count        = 0
   Rx Resource Errors    = 0            Input Drops           = 1104309
   Input Errors           = 610494
   Output Drops          = 0            Giants/Runts          = 0/0
   Dma Mem Error         = 0            Input Overrun         = 0
#show int te X/0/0
TenGigabitEthernetX/0/0 is up, line protocol is up (connected)
MTU 4470 bytes, BW 10000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 20/255, rxload 43/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Carrier delay is 0 msec
Full-duplex, 10Gb/s
Transport mode LAN (10GBASE-R, 10.3125Gb/s)
input flow-control is on, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 2w1d
Input queue: 0/75/38/33 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 1691089000 bits/sec, 390075 packets/sec
5 minute output rate 818470000 bits/sec, 413745 packets/sec
L2 Switched: ucast: 5460795 pkt, 851382131 bytes - mcast: 557617 pkt, 63052504 bytes
L3 in Switched: ucast: 72659051788 pkt, 57114890177182 bytes - mcast: 0 pkt, 0 bytes mcast
L3 out Switched: ucast: 237095519242 pkt, 42944537492139 bytes mcast: 0 pkt, 0 bytes
     704163207990 packets input, 315321595661874 bytes, 1 no buffer
     Received 1125 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 3 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 567310 multicast, 0 pause input
     0 input packets with dribble condition detected
     786519825664 packets output, 210404496698710 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
#show int te X/0/0
TenGigabitEthernetY/0/0 is up, line protocol is up (connected)
MTU 4470 bytes, BW 10000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 5/255, rxload 2/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Carrier delay is 0 msec
Full-duplex, 10Gb/s
Transport mode LAN (10GBASE-R, 10.3125Gb/s)
input flow-control is on, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 2w1d
Input queue: 0/75/292/19 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 112466000 bits/sec, 66131 packets/sec
5 minute output rate 221669000 bits/sec, 69520 packets/sec
L2 Switched: ucast: 2161150 pkt, 440372316 bytes - mcast: 514981 pkt, 65137030 bytes
L3 in Switched: ucast: 5460878448 pkt, 1060741666543 bytes - mcast: 0 pkt, 0 bytes mcast
L3 out Switched: ucast: 3518851937 pkt, 2138635500086 bytes mcast: 0 pkt, 0 bytes
     136383893748 packets input, 34454049909804 bytes, 1 no buffer
     Received 1125 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 3 throttles
     267 input errors, 220 CRC, 47 frame, 0 overrun, 0 ignored
     0 watchdog, 536405 multicast, 0 pause input
     0 input packets with dribble condition detected
     124870339660 packets output, 57889219631351 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
There was no any flap observed on the physical interface. IGP protocol is also running thru the same physical links & that was UP & stable.
Please tell me how do we check the TCP MSS value this LDP sessions.
- Pradip

Problem! time over for purchase session.

I've purchased a (MobiXplorer) from the ovi store, using the Nokia 5800.
the purchase was made, by own Visa card
I could not download the program, because time over for purchase session.
Please what is the problem! Help me

Cross-posted in many forums. Don't answer this one.

UCCX Agent Desktop v.7 taking over Windows active session when phone rings

I'm trying to figure out how (if possible) for the Cisco UCCX Agent Desktop application from taking over a users Windows session every time the phone rings. This is very annoying and takes the end user out of what ever application they are currently in whenever their phone rings. Does anyone know how to change this?

Hi Eric,
Maybe this is better
Miscellaneous tab options.
Option Description
Window Behavior Specify how you want the Agent Desktop window to
behave:
• Normal. The window appears when calls are
present and minimizes when idle.
• Keep Open. The window is always visible, but may
be hidden by other open applications.
• Always on Top. The window is always visible and on
top of other open applications.
• Stealth. The window appears as an icon in the
system tray.
http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/cad_enterprise/cadenterprise7_0/user/guide/cda700ug.pdf
Cheers!
Rob

Redirection, target and session

Hi,
I'm a french developer, and i'm facing a problem for which i haven't found a solution yet.
Let me explain :
I'm developing a web application in JSP. In this webapp, I try to use sessions, but, when I redirects the user to a new page - in a target frame - using JavaScript, it seems that I loose the session..
In fact, I have noted that the session ID was different in the two pages.
It seems too, that one can not use the response.sendRedirect on a target frame.. but this expression seems to be the one to use with the sessions..
I'm lost..
Is there somebody to help me?

From your first description the session id seems to be lost during the JavaScript-redirect. If you have to use JavaScript, make sure that cookies are enabled for tracking the session id or the redirection url is created using response.encodeURL() in order to enable url rewriting.
Example:
out.println("<a href=\"" + response.encodeURL(request.getContextPath() + "/whatever") + "\">Link Description</a>");Maybe you should print the session id to a server side log file and into the response to compare the session ids and find out at which point the session id changes.
Carsten

Installing over Target Disk Mode using Grey (OEM-type) Discs

I have a set of Tiger grey install discs labeled for use with a Power Mac G5. I would like to use them to upgrade our eMac, but they obviously don't allow this. I have some family who own a G5, and was wondering if it would be possible to connect the eMac to their computer under Target Disk Mode, then install on the eMac by running the installation on the G5. Anyone have any experience trying something smilar?
I know some will probably say doing this would be a violation of the EULA, but I have looked through the license agreement that came with the discs and haven't seen anything that would prohibit such an installation. It is my understanding that starting with version 10.4.4 of OS X, Apple added a clause to the EULA stating that the grey install discs were only permitted for use with the computer they originally shipped with, but prior to this there were no such prohibitions (these discs are labelled as version 10.4.2).
Thanks for any help

Hi sjpetrick, and a warm welcome to the forums!
Physically that would work to install, BUT whether the iMac will Boot/Run thinking it's a G5 is questionable, and even if it does boot, It won't have some needed drivers for the eMac.

Getting two differents UrlConnection.inputStream() over the same Session

I need to access two diferents webservices by GET method but to access the second one the session created by the first must be alive. Till now, I got something like the following code but this code doesn�t let session keep alive. I would like to advise that I cannot use web tools like servlets to manage this =/
DocumentBuilderFactory dbf;
   DocumentBuilder docBuilder;
   public ClasseXML(){
      dbf = DocumentBuilderFactory.newInstance();
      try {
         docBuilder = dbf.newDocumentBuilder();
      } catch (ParserConfigurationException e) {
         alerta("Parsing error: "+e.getMessage());
   public void request1(String params) {
      try{
         String url = myHost+"/"+params;
         Document doc = docBuilder.parse( new URL(url).openStream() );
   public void request2(String params) {
      try{
         String url = myHost+"/"+params;
         System.out.println( url );
         Document doc = docBuilder.parse( new URL(url).openStream() );
...

So you are connecting to Server X, and you want to send two web service requests to that server? And you want the server to process both requests in the same session?
If that's what you mean, then you have to do whatever the server wants you to do to maintain the session. Often servers send a cookie to the client and require it to be sent back to maintain a session, but that's not the only way. Your first step is to find out how the server is maintaining the session. If there's no published information about that, and you have nobody to ask, then you would have to reverse engineer the requests and responses in a normal session.
Then you would have to write your code to send the same requests and handle the responses accordingly.

I just updated to the newest Firefox 9.0.1 and now I get pop up ads as a new tab that takes over my web session. Firefox also crashes my whole computer and restarts it. I am running Windows XP Pro.

Pop Ad tabs include ad, when I close it asks if I'm sure I want to leave the page. I say yes and then there is another survey ad that says I may have won something. This whole process requires at least 4 denials before I can get the page to close.
Periodically my computer will freeze and restart when I am using Firefox.

Sounds like Malware.
Install, update, and run these programs in this order. They are listed in order of efficacy. '''''(Not all programs detect the same Malware, so you may need to run them all to solve your problem.)''''' These programs are all free for personal use, but some have limited functionality in the "free mode" - but those are features you really don't need to find and remove the problem that you have. 
''Note: If your Malware infection is bad enough and you are mis-directed to URL's other than what is posted, you may have to use a different PC to download these programs and use a USB stick to transfer them to the afflicted PC.''
Malwarebytes' Anti-Malware - [http://www.malwarebytes.org/mbam.php] 
SuperAntispyware - [http://www.superantispyware.com/] 
AdAware - [http://www.lavasoftusa.com/software/adaware/] 
Spybot Search & Destroy - [http://www.safer-networking.org/en/index.html] 
Windows Defender: Home Page - [http://www.microsoft.com/windows/products/winfamily/defender/default.mspx] 
Also, if you have a search engine re-direct problem, see this: 
http://deletemalware.blogspot.com/2010/02/remove-google-redirect-virus.html
If these don't find it or can't clear it, post in one of these forums for specialized malware removal help: 
[http://www.spywarewarrior.com/index.php] 
[http://forum.aumha.org/] 
[http://www.spywareinfoforum.com/] 
[http://bleepingcomputer.com]

Advertising ipv4 routes via ipv6 bgp peers

Hello,
I have established IPV6 bgp sessions with ipv6 prefix-list filter. But ipv4 routes were advertised over this bgp session. Do I I need special configuration under address family or ipv4 prefix-list filters required ?
Note : the config was IBGP between 7200 routers and 6509 core switches.
Thank you all
Nael

Hi Nael,
This is because address-family ipv4 unicast gets activated by default when you configure a new neighbor in BGP. You either need to configure "no bgp default ipv4-unicast" or go under address-family ipv4 unicast and do a "no neighbor" for the ipv6 neighbor.
Hope this helps

Inter-as L2 multi sites

Hi
I need MPLS inter-as L2 Communication between different AS. Point to multipoint, multipoint to Point, like a big L2 cloud.
Like a Lan connected to 2 PE for router redundancy, it need to have L2 to other sites in different MPLS AS.
VPLS? eVPN? with something to handle inter-as
Using ASR 9001 In core and between core and ASR 901 out in the field.
Thanks

Hello,
Glad to see it worked.
To my knowledge, the LDP Router ID is actually used as an IP address, i.e. when LDP contacts a peer, it sends packets towards its Router ID (RID) as an IP address. This brings up various sorts of problematic behavior:
If the interface from which the RID was borrowed is not advertised in a routing protocol, the LDP session fails because it tries to connect to an IP address for which there is no known route.
If a targeted LDP session is established, it must be established towards the RID of the destination LSR as an IP address. Otherwise, the targeted LDP session will not be built and the following error message may be displayed:
*Mar 1 00:02:16.043: %ATOM_TRANS-4-CONFIG: 10.255.255.1 mismatches the peer router id 10.0.12.1
In this example, the 10.255.255.1 was an IP address specified in the xconnect command while the LDP RID of that router was 10.0.12.1.
LDP for packet-based IP networks uses per-platform label space, i.e. regardless of the ingress interface, the label assignment to a particular FEC is identical. However, the router itself may have several interfaces and several IP addresses, and it is hence possible to have several ways to contact this peer, especially over common segments. Therefore, it is prudent to establish only a single session if possible, because the label mappings advertised through multiple LDP peerings would still be the same. This is accomplished by contacting the neighbor under its single LDP RID. This is the underlying reason behind the requirement of matching the contacted router's IP address with the LDP RID.
Best regards,
Peter

Prefix FEC advertised over targeted LDP session

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