[j-nsp] MPLS L3VPNs, Route-Reflection, and SPRING with IS-IS on QFX5100
Brant Ian Stevens
branto at argentiumsolutions.com
Mon Jul 3 14:19:39 EDT 2017
I posted to the Juniper Forums, but figured I should try here as well:
Hello All,
I am attempting to build a network with the captioned technologies, and
am most of the way there, but am running into an issue.
We want to use a separate loopback address for our MP-BGP peering
sessions in support of the MPLS VPNs address family, but the "secondary"
address on the loopback interface does not get a label assigned to it in
the IS-IS database. The addresses in the 10.242.0.0/24 range are the
inet-vpn loopback sources, while the addresses in the 100.64.0.0/24
range are the loopback ranges that are used for inet-labeledunicast.
branto at peer-rtr-01# show interfaces lo0
unit 0 {
family inet {
address 100.64.0.7/32; This address is assigned a label.
address 10.242.0.7/32; This address does NOT get assigned a label.
}
family iso {
address 49.0000.0100.0064.0007.00;
}
family mpls;
}
unit 4000 {
family inet {
address 10.240.0.7/32;
}
}
branto at peer-rtr-01# run show route 10.242.0.0/24
inet.0: 38 destinations, 41 routes (38 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.242.0.1/32 *[IS-IS/18] 22:15:08, metric 25
> to 100.64.1.6 via et-0/0/48.0
10.242.0.3/32 *[IS-IS/18] 22:15:08, metric 50
> to 100.64.1.6 via et-0/0/48.0
*10.242.0.5/32 *[IS-IS/18] 22:15:08, metric 50*
*> to 100.64.1.6 via et-0/0/48.0*
10.242.0.7/32 *[Direct/0] 22:46:30
> via lo0.0
branto at peer-rtr-01# run show route 100.64.0.0/24
inet.0: 38 destinations, 41 routes (38 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
100.64.0.1/32 *[L-ISIS/14] 22:15:30, metric 25
> to 100.64.1.6 via et-0/0/48.0
[IS-IS/18] 22:15:30, metric 25
> to 100.64.1.6 via et-0/0/48.0
100.64.0.3/32 *[L-ISIS/14] 22:15:30, metric 50
> to 100.64.1.6 via et-0/0/48.0, Push 19
[IS-IS/18] 22:15:30, metric 50
> to 100.64.1.6 via et-0/0/48.0
*100.64.0.5/32 *[L-ISIS/14] 22:15:30, metric 50*
*> to 100.64.1.6 via et-0/0/48.0, Push 21*
*[IS-IS/18] 22:15:30, metric 50*
*> to 100.64.1.6 via et-0/0/48.0*
100.64.0.7/32 *[Direct/0] 22:46:52
> via lo0.0
inet.3: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
100.64.0.1/32 *[L-ISIS/14] 22:15:30, metric 25
> to 100.64.1.6 via et-0/0/48.0
100.64.0.3/32 *[L-ISIS/14] 22:15:30, metric 50
> to 100.64.1.6 via et-0/0/48.0, Push 19
*100.64.0.5/32 *[L-ISIS/14] 22:15:30, metric 50*
*> to 100.64.1.6 via et-0/0/48.0, Push 21*
{master:0}[edit]
branto at peer-rtr-01#
The VPN routes are reflected across the network properly and received,
but the next-hop is unusable.
branto at peer-rtr-01# run show route protocol bgp hidden table bgp.l3vpn.0 extensive
bgp.l3vpn.0: 2 destinations, 2 routes (0 active, 0 holddown, 2 hidden)
10.242.0.5:1:10.240.0.5/32 (1 entry, 0 announced)
BGP Preference: 170/-101
Route Distinguisher: 10.242.0.5:1
Next hop type: Unusable, Next hop index: 0
Address: 0xa2f1744
Next-hop reference count: 4
State:<Hidden Int Ext ProtectionPath ProtectionCand>
Local AS: 29749 Peer AS: 29749
Age: 22:27:35
Validation State: unverified
Task: BGP_29749.10.242.0.1
AS path: I (Originator)
Cluster list: 10.242.0.1
Originator ID: 100.64.0.5
Communities: target:29749:5
Import Accepted
VPN Label: 4114
Localpref: 100
Router ID: 100.64.0.1
Secondary Tables: sinewave-mgmt.inet.0
Indirect next hops: 1
Protocol next hop: 10.242.0.5
Label operation: Push 4114
Label TTL action: prop-ttl
Load balance label: Label 4114: None;
Indirect next hop: 0x0 - INH Session ID: 0x0
Here's my IS-IS config from the routers in question:
PE Router 1:
branto at peer-rtr-01# show protocols isis
reference-bandwidth 1000g;
traffic-engineering {
family inet {
shortcuts;
}
family inet6 {
shortcuts;
}
family inet-mpls {
shortcuts;
}
}
source-packet-routing {
node-segment {
ipv4-index 7;
ipv6-index 607;
}
}
level 1 disable;
level 2 wide-metrics-only;
interface et-0/0/48.0 {
point-to-point;
}
interface lo0.0 {
point-to-point;
passive;
}
{master:0}[edit]
branto at peer-rtr-01#
PE Router 2:
branto at bb-rtr-01# show protocols isis
reference-bandwidth 1000g;
traffic-engineering {
family inet {
shortcuts;
}
family inet6 {
shortcuts;
}
family inet-mpls {
shortcuts;
}
family inet6-mpls {
shortcuts;
}
}
source-packet-routing {
node-segment {
ipv4-index 5;
ipv6-index 605;
}
}
level 1 disable;
level 2 wide-metrics-only;
interface et-0/0/48.0 {
point-to-point;
}
interface lo0.0 {
point-to-point;
passive;
}
{master:0}[edit]
branto at bb-rtr-01#
I am totally open to suggestions on how to work around this, with using
only one peering address being the total last resort.
--
--
Regards,
--
Brant I. Stevens, Principal & Consulting Architect
branto at argentiumsolutions.com
d:212.931.8566, x101. m:917.673.6536. f:917.525.4759.
http://argentiumsolutions.com
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