Questions tagged [ldp]
A tag for the Label Distribution Protocol (LDP), a protocol in which routers capable of Multiprotocol Label Switching (MPLS) exchange label mapping information.
21 questions
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Do Juniper l2circuit services (ccc) support a mismatched encapsulation type?
I am building an l2circuit ccc (draft-martini) between an EX4500 and an MX204.
The issue is that I need to have mismatched l2circuit encapsulation-type on either side.
The East-coast EX4550-32F (Junos:...
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What are LDP-MPLS advantages?
An LDP-MPLS is deployed on a network and labels are used for packet forwarding. As you may know, LDP needs IGP and there is IGP too. Because there is no RSVP, there is no traffic engineering and there ...
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MPLS LDP transport address should it be always loopback IP
Can the transport address for the LDP be different from the loopback IP? LSR ID would be loopback while the transport address would be interface IP.
For example, if the interface IP is the transport ...
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What is the difference between Targeted LDP and Directed LDP in MPLS?
Please explain the main differences (use cases) between Targeted LDP and Directed LDP in MPLS ?
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How are labels in LDP "Label Mapping Message" associated with IP prefix?
Let's say, that I have two directly connected routers r1 and r2. For example, I do see that the r2 sends a Label Mapping Message to r1 and provides several labels including 21(0x15):
r1 associates ...
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Why are the LDP installed LSPs not seen in the output of "show mpls lsp" in Junos?
I have established a LDP session between routers r1(lo0.0 has 192.168.1.1 configured) and r4(lo0.0 has 192.168.1.4 configured). According to show route table inet.3 192.168.1.4 in r1 the BGP prefixes ...
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Secure MPLS configuration: Does TCP port 646 (LDP) need to be generally exposed?
I am looking for expertise on MPLS configurations and security. A recent Nmap scan of my organization's public IPv4 perimeter networks has discovered a system which appears to be listening on TCP port ...
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PE route down in LDP based VPLS Connection in Juniper MX
I am observing 'PE route down message ' against LDP based VPLS connection on Juniper MX. The IGP protocol is IS-IS. LDP VPLS connectivity is point to point (having only two end points).
When I check ...
- 1,162
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LDP: which FEC an egress router has to advertise when using Ordered Control?
If an egress router knows how to reach a set of distinct and indipendent networks (say, two or more non overlapping IP prefixes in its routing table), is it expected to announce one single FEC for ...
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LDP: which FEC to advertise when using Ordered Control?
I have the following doubt: if an egress router knows how to reach a set of subnets, is it expected to bind all those remote destinations in just a FEC (one label) or has it to bind a label for each ...
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H-VPLS application with different types of VPLS
so ive been digging around VPLS for a while and i have come across a term H-VPLS.
My knowledge is: VPLS can be signalled using LDP (manual or autodiscovery) or BGP (autodiscovery).
H-VPLS: ...
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mLACP / MC-LAG between Cisco / Juniper
I am working on a LDP signalled VPLS topology (picture)
What I am trying to accomplish here is to establish a redundant connection to CE1.
CE1 has both interfaces in a port-channel with an IP.
My ...
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IGP vs LDP forwarding
By default when MPLS and LDP is configured in a cisco IOS/IOSXR and some IGP.
If I forward a packet toward internal IP. Router will use MPLS to get destination. When show the routing table I only can ...
user52580
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Does LDP not generate a label for default route for ISIS Level 2?
LDP generates local bindings for all the routes in the routing table. I configured an ISIS topology such that:
R1 ----- R2 ----- R3 ----- R4 ----- R5
L1 L1/2 L2 L1/2 L1
...
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Why VPWS service - MPLS has a two ethernet frame headers?
I am trying to understand VPWS services, and going through RFC 4448, Encapsulation Methods for Transport of Ethernet over MPLS Networks.
Here is the packet capture:
Why there is a need for again ...
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How are the LERs determined in an MPLS LSP using LDP
Preface;
In the below topology R1 and R6 are PEs, all others are P routers, all routers are running c7200-jk9s-mz.124-13b.bin. At this point IGP is fully converged (OSPF with all interfaces in area 0 ...
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Label to Route mapping, Label generation scalability
In MPLS enabled routers, is a unique label generated per Destination prefix in routing Table or is it per Next-hop in the routing table if not both, how is the mapping between unique labels and ...
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What is a FEC in MPLS domain?
Does FEC correspond to a Next-hop ipaddress or Destination Ipaddress or a combination of Next-hop/Destination Ipaddress and QOS values ?
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Can 2 peering LSR generate same Label to same or different prefix and distribute among them?
Scope of the MPLS labels are within a router or within a interface right ?. So which means the peering neighbor LSR router can generate label values of its own.So say with below mpls topology.
|LSR1|-...
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VPLS Multihoming on Junos - FEC confusion
I'm going over the VPLS multihoming options on Juniper's web site. I'm not concerned with LAG and MC-LAG for the moment.
As far as I'm aware:
FEC128 is when you are using manual discovery of ...
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How to force VPLS/L2VPN to use a specific path
We're using VPLS and L2VPN on Juniper MX for L2 connections. Signaling is done via BGP and label distribution via LDP.
Now we want one L2VPN to use a specific path trough the network and not follow ...
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