Step 1 |
enable
Example:
Switch> enable
|
Enables
privileged EXEC mode. Enter your password if prompted.
|
Step 2 |
show
ip
igmp
groups
Example:
Switch# show ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
239.1.2.3 GigabitEthernet1/0/0 00:05:14 00:02:14 10.1.0.6
224.0.1.39 GigabitEthernet0/0/0 00:09:11 00:02:08 172.31.100.1
|
Verifies IGMP
memberships on the last hop router. This information will confirm the multicast
groups with receivers that are directly connected to the last hop router and
that are learned through IGMP.
|
Step 3 |
show
ip
pim
rp
mapping
Example:
Switch# show ip pim rp mapping
PIM Group-to-RP Mappings
Group(s) 224.0.0.0/4
RP 172.16.0.1 (?), v2v1
Info source: 172.16.0.1 (?), elected via Auto-RP
Uptime: 00:09:11, expires: 00:02:47
|
Confirms that
the group-to-RP mappings are being populated correctly on the last hop router.
Note
|
Ignore this
step if you are verifying a last hop router in a PIM-SSM network. The
show
ip
pim
rp
mappingcommand does not work with routers in a
PIM-SSM network because PIM-SSM does not use RPs. In addition, if configured
correctly, PIM-SSM groups do not appear in the output of the
show
ip
pim
rp
mappingcommand.
|
|
Step 4 |
show
ip
mroute
Example:
Switch# show ip mroute
(*, 239.1.2.3), 00:05:14/00:03:04, RP 172.16.0.1, flags: SJC
Incoming interface: GigabitEthernet0/0/0, RPF nbr 172.31.100.1
Outgoing interface list:
GigabitEthernet1/0, Forward/Sparse-Dense, 00:05:10/00:03:04
(10.0.0.1, 239.1.2.3), 00:02:49/00:03:29, flags: T
Incoming interface: GigabitEthernet0/0/0, RPF nbr 172.31.100.1
Outgoing interface list:
GigabitEthernet1/0, Forward/Sparse-Dense, 00:02:49/00:03:04
(*, 224.0.1.39), 00:10:05/stopped, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
GigabitEthernet1/0, Forward/Sparse-Dense, 00:05:15/00:00:00
GigabitEthernet0/0, Forward/Sparse-Dense, 00:10:05/00:00:00
(172.16.0.1, 224.0.1.39), 00:02:00/00:01:33, flags: PTX
Incoming interface: GigabitEthernet0/0/0, RPF nbr 172.31.100.1
|
Verifies that
the mroute table is being populated properly on the last hop router.
|
Step 5 |
show
ip
interface
[type
number]
Example:
Switch# show ip interface GigabitEthernet 0/0/0
GigabitEthernet0/0 is up, line protocol is up
Internet address is 172.31.100.2/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.1 224.0.0.22 224.0.0.13
224.0.0.5 224.0.0.6
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is disabled
IP Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is disabled
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled
|
Verifies that
multicast fast switching is enabled for optimal performance on the outgoing
interface on the last hop router.
Note
|
Using the
no
ip
mroute-cache interface command disables IP
multicast fast-switching. When IP multicast fast switching is disabled, packets
are forwarded through the process-switched path.
|
|
Step 6 |
show
ip
pim
interface
count
Example:
Switch# show ip pim interface count
State: * - Fast Switched, D - Distributed Fast Switched
H - Hardware Switching Enabled
Address Interface FS Mpackets In/Out
172.31.100.2 GigabitEthernet0/0/0 * 4122/0
10.1.0.1 GigabitEthernet1/0/0 * 0/3193
|
Confirms that
multicast traffic is being forwarded on the last hop router.
|
Step 7 |
show
ip
mroute
count
Example:
Switch# show ip mroute count
IP Multicast Statistics
6 routes using 4008 bytes of memory
3 groups, 1.00 average sources per group
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group: 239.1.2.3, Source count: 1, Packets forwarded: 3165, Packets received: 3165
RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
Source: 10.0.0.1/32, Forwarding: 3165/20/28/4, Other: 0/0/0
Group: 224.0.1.39, Source count: 1, Packets forwarded: 21, Packets received: 120
Source: 172.16.0.1/32, Forwarding: 21/1/48/0, Other: 120/0/99
Group: 224.0.1.40, Source count: 1, Packets forwarded: 10, Packets received: 10
Source: 172.16.0.1/32, Forwarding: 10/1/48/0, Other: 10/0/0
|
Confirms that
multicast traffic is being forwarded on the last hop router.
|
Step 8 |
show
ip
mroute
active
[kb/s]
Example:
Switch# show ip mroute active
Active IP Multicast Sources - sending >= 4 kbps
Group: 239.1.2.3, (?)
Source: 10.0.0.1 (?)
Rate: 20 pps/4 kbps(1sec), 4 kbps(last 50 secs), 4 kbps(life avg)
|
Displays
information about active multicast sources sending traffic to groups on the
last hop router. The output of this command provides information about the
multicast packet rate for active sources.
Note
|
By default,
the output of the
show
ip
mroute command with the
active
keyword displays information about active sources sending traffic to groups at
a rate greater than or equal to 4 kb/s. To display information about active
sources sending low-rate traffic to groups (that is, traffic less than 4 kb/s),
specify a value of 1 for the
kb/s
argument. Specifying a value of 1 for this argument displays information about
active sources sending traffic to groups at a rate equal to or greater than 1
kb/s, which effectively displays information about all possible active source
traffic.
|
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