Cisco Catalyst 4500 Series Configuration Manual page 843

Chapter 2
A route can also have a set of flags associated with one or more interfaces. For an (S,G) route, the flags
on interface 1 indicate how the ingress packets should be treated and whether packets matching the route
should be forwarded onto interface 1. These per-interface flags are associated with the MFIB routes:
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Examples The following example shows how to display all active MFIB routes:
Switch# show ip mfib
IP Multicast Forwarding Information Base
Entry Flags: C - Directly Connected, S - Signal,
Interface Flags: A - Accept, F - Forward, NS - Signal,
Packets: Fast/Partial/Slow Bytes: Fast/Partial/Slow:
(171.69.10.13, 224.0.1.40), flags (IC)
Packets: 2292/2292/0, Bytes: 518803/0/518803
Vlan7 (A)
Vlan100 (F NS)
Vlan105 (F NS)
(*, 224.0.1.60), flags ()
Packets: 2292/0/0, Bytes: 518803/0/0
Vlan7 (A NS)
(*, 224.0.1.75), flags ()
Vlan7 (A NS)
(10.34.2.92, 239.192.128.80), flags ()
Packets: 24579/100/0, 2113788/15000/0 bytes
Vlan7 (F NS)
Vlan100 (A)
(*, 239.193.100.70), flags ()
Packets: 1/0/0, 1500/0/0 bytes
Vlan7 (A)
Switch#
Related Commands Command
clear ip mfib counters
Accepting (A)—Set on the RPF interface when a packet that arrives on the interface and that is
marked as Accepting (A) is forwarded to all Forwarding (F) interfaces.
Forwarding (F)—Used with the A flag as described above. The set of forwarding interfaces together
form a multicast olist or output interface list.
Signaling (S)—Set on an interface when a multicast routing protocol process in Cisco IOS needs to
be notified of ingress packets on that interface.
Not Platform (NP) fast-switched—Used with the F flag. A forwarding interface is also marked as
Not Platform fast-switched whenever that output interface cannot be fast-switched by the platform
hardware and requires software forwarding.
IC - Internal Copy
NP - Not platform switched
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
Description
Clears the global MFIB counters and the counters for all
active MFIB routes.
show ip mfib
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