Applying Egress Layer 3 Acls (Control-Plane); Ip Prefix Lists - Dell S4048–ON Configuration Manual

seq 10 deny icmp any any
seq 15 permit 1.1.1.2
Dell#configure terminal
Dell(conf)#interface te 1/2
Dell(conf-if-te-1/2)#ip vrf forwarding blue
Dell(conf-if-te-1/2)#show config
!
interface TenGigabitEthernet 1/2
ip vrf forwarding blue
no ip address
shutdown
Dell(conf-if-te-1/2)#
Dell(conf-if-te-1/2)#
Dell(conf-if-te-1/2)#end
Dell#

Applying Egress Layer 3 ACLs (Control-Plane)

By default, packets originated from the system are not filtered by egress ACLs.
For example, if you initiate a ping session from the system and apply an egress ACL to block this type of traffic on the interface, the
ACL does not affect that ping traffic. The Control Plane Egress Layer 3 ACL feature enhances IP reachability debugging by
implementing control-plane ACLs for CPU-generated and CPU-forwarded traffic. Using permit rules with the count option, you can
track on a per-flow basis whether CPU-generated and CPU-forwarded packets were transmitted successfully.
NOTE: The ip control-plane [egress filter] and the ipv6 control-plane [egress filter]
commands are not supported.
1. Apply Egress ACLs to IPv4 system traffic.
CONFIGURATION mode
ip control-plane [egress filter]
2. Apply Egress ACLs to IPv6 system traffic.
CONFIGURATION mode
ipv6 control-plane [egress filter]
3. Create a Layer 3 ACL using permit rules with the count option to describe the desired CPU traffic.
CONFIG-NACL mode
permit ip {source mask | any | host ip-address} {destination mask | any | host ip-
address} count
FTOS Behavior: Virtual router redundancy protocol (VRRP) hellos and internet group management protocol (IGMP) packets are not
affected when you enable egress ACL filtering for CPU traffic. Packets sent by the CPU with the source address as the VRRP virtual
IP address have the interface MAC address instead of VRRP virtual MAC address.

IP Prefix Lists

IP prefix lists control routing policy. An IP prefix list is a series of sequential filters that contain a matching criterion (examine IP route
prefix) and an action (permit or deny) to process routes. The filters are processed in sequence so that if a route prefix does not
match the criterion in the first filter, the second filter (if configured) is applied. When the route prefix matches a filter, Dell
Networking OS drops or forwards the packet based on the filter's designated action. If the route prefix does not match any of the
filters in the prefix list, the route is dropped (that is, implicit deny).
A route prefix is an IP address pattern that matches on bits within the IP address. The format of a route prefix is A.B.C.D/X where
A.B.C.D is a dotted-decimal address and /X is the number of bits that should be matched of the dotted decimal address. For
example, in 112.24.0.0/16, the first 16 bits of the address 112.24.0.0 match all addresses between 112.24.0.0 to 112.24.255.255.
128
Access Control Lists (ACLs)