Configuring Rsvp Packet Dropping - Cisco NCS 5500 Series Configuration Manual

Implementing RSVP for MPLS-TE
Configuration Example
This example configures ACL based prefix filtering on RSVP RA packets. When RSVP receives a RA packet
from source address 1.1.1.1 it is forwarded and packets destined to the IP address 2.2.2.2 are dropped.
RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# ipv4 access-list rsvpac1
RP/0/RP0/CPU0:router(config-ipv4-acl)# 10 permit ip host 1.1.1.1 any
RP/0/RP0/CPU0:router(config-ipv4-acl)# 20 deny ip any host 2.2.2.2
RP/0/RP0/CPU0:router(config)# rsvp
RP/0/RP0/CPU0:router(config-rsvp)# signalling prefix-filtering access-list rsvp-acl
RP/0/RP0/CPU0:router(config)# commit
Verification
Verify the configuration of ACL based prefix filtering
RP/0/RP0/CPU0:router# show rsvp counters prefix-filtering access-list rsvp-ac1
ACL:rsvp-ac1
Path
PathTear
ResvConfirm
Total
Related Topics
• Configuring RSVP Packet Dropping, on page 33

Configuring RSVP Packet Dropping

You can configure extended access lists (ACLs) to forward, drop, or perform normal processing on RSVP
router-alert (RA) packets. By default, RSVP processes the RA packets even if the ACL match yields an implicit
deny. You can configure RSVP to drop RA packets when the ACL matches results in an implicit deny.
Configuration Example
This example configures ACL based prefix filtering on RSVP RA packets. When RSVP receives a RA packet
from source address 1.1.1.1 it is forwarded and packets destined to the IP address 2.2.2.2 are dropped. RA
packets are dropped if the ACL matches results in an implicit deny.
RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# ipv4 access-list rsvpac1
RP/0/RP0/CPU0:router(config-ipv4-acl)# 10 permit ip host 1.1.1.1 any
RP/0/RP0/CPU0:router(config-ipv4-acl)# 20 deny ip any host 2.2.2.2
RP/0/RP0/CPU0:router(config)# rsvp
RP/0/RP0/CPU0:router(config-rsvp)# signalling prefix-filtering default-deny-action
RP/0/RP0/CPU0:router(config)# commit
Verification
Verify the configuration of RSVP packet drop using the following command.
RP/0/RP0/CPU0:router# show rsvp counters prefix-filtering access-list rsvpac1
ACL: rsvpac1
Path
PathTear
ResvConfirm
Total
Forward Local
0 0
0 0
0 0
0 0
Forward Local
4 1
0 0
0 0
4 1
MPLS Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
Configuring RSVP for MPLS-TE
Drop Total
0 0
0 0
0 0
0
Drop Total
0 5
0 0
0 0
0 5
33