Label Acceptance Control Configuration Example - HP FlexNetwork 10500 Series Configuration Manual

5 packets transmitted, 5 packets received, 0.0% packet loss
Round-trip min/avg/max = 1/1/1 ms

Label acceptance control configuration example

Network requirements
Two links, Switch A—Switch B—Switch C and Switch A—Switch D—Switch C, exist between
subnets 11.1.1.0/24 and 21.1.1.0/24.
Configure LDP to establish LSPs only for routes to subnets 11.1.1.0/24 and 21.1.1.0/24.
Configure LDP to establish LSPs only on the link Switch A—Switch B—Switch C to forward traffic
between subnets 11.1.1.0/24 and 21.1.1.0/24.
Figure 19 Network diagram
11.1.1.0/24
Requirements analysis
•
To ensure that the LSRs establish IPv4 LSPs automatically, enable IPv4 LDP on each LSR.
•
To establish IPv4 LDP LSPs, configure an IPv4 routing protocol to ensure IP connectivity
between the LSRs. This example uses OSPF.
•
To ensure that LDP establishes IPv4 LSPs only for the routes 11.1.1.0/24 and 21.1.1.0/24,
configure IPv4 LSP generation policies on each LSR.
•
To ensure that LDP establishes IPv4 LSPs only over the link Switch A—Switch B—Switch C,
configure IPv4 label acceptance policies as follows:
Switch A accepts only the label mapping for FEC 21.1.1.0/24 received from Switch B.

Switch A denies the label mapping for FEC 21.1.1.0/24 received from Switch D.
Switch C accepts only the label mapping for FEC 11.1.1.0/24 received from Switch B.

Switch C denies the label mapping for FEC 11.1.1.0/24 received from Switch D.
Configuration procedure
Before configuration, disable the spanning tree feature globally or map each VLAN to an MSTI. For
more information, see Layer 2—LAN Switching Configuration Guide.
1. Configure IP addresses and masks for interfaces, including the loopback interfaces, as shown
in Figure
2. Configure OSPF on each switch to ensure IP connectivity between them. (Details not shown.)
3. Enable MPLS and IPv4 LDP:
Loop0
1.1.1.9/32
Vlan-int2
10.1.1.1/24
Vlan-int4 Vlan-int6
11.1.1.1/24 30.1.1.1/24
Switch A
19. (Details not shown.)
Loop0
2.2.2.9/32
Vlan-int2 Vlan-int3
10.1.1.2/24 20.1.1.1/24
Switch B
Loop0
4.4.4.9/32
Vlan-int6 Vlan-int7
30.1.1.2/24 40.1.1.1/24
Switch D
44
Loop0
3.3.3.9/32
Vlan-int3
20.1.1.2/24
Vlan-int7
Vlan-int5
40.1.1.2/24
21.1.1.1/24
Switch C
21.1.1.0/24