PIM Neighbor Table
 |
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Neighbor Address |
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|
| Interface |
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|
|
| Uptime |
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|
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| Expires |
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|
|
| Ver |
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|
|
| Mode |
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|
|
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172.16.3.1 |
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|
| Serial 1 |
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|
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| 00:09:40 |
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|
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| 00:01:35 |
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|
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| v2 |
| |
|
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| Dense |
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|
|
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172.16.4.2 |
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|
| Ethernet0 |
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|
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| 00:41:57 |
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|
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| 00:01:19 |
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|
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| v2 |
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|
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| Dense (DR) |
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|
|
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The
fields in the neighbor address are described below. |
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|
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Neighbor address |
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|
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IP
Address of the PIM neighbor. |
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|
|
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Interface |
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|
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Interface on which the neighbor is attached. |
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|
|
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Uptime |
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|
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How
long in hours, minutes, and seconds the neighbor has been in the PIM neighbor
table. |
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|
|
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Expires |
| |
|
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Time
to elapse before the neighbor is removed from the table in hours, minutes, and
seconds. |
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|
|
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Mode |
| |
|
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PIM
mode of the interface. |
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|
|
| |
(DR) |
| |
|
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The
neighbor is the designated router on a multi-access network. |
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|
|
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The
state of a PIM interface can be displayed using the show ip pim
interface command. |
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|
| |
show ip pim interface [interface-type interface-number] [count] |
| |
|
| |
interface-type
interface-number |
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|
| |
Optional. Type and number of the interface (Ethernet 0, Serial 1,
etc.) |
| |
|
|
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Optional. Number of packets that have been sent and received on the
interface |
| |
|
| |
B4ashow ip pim interface |
| |
|
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Address |
| |
|
| Interface |
| |
|
|
| Version/Mode |
| |
|
|
| Nbr Count |
| |
|
|
| Query Intvl |
| |
|
|
| DR |
| |
|
|
| |
172.16.4.2 |
| |
|
| Ethernet0 |
| |
|
|
| v2/Dense |
| |
|
|
| 1 |
| |
|
|
| 30 |
| |
|
|
| 172.16.4.1 |
| |
|
|
| |
172.16.3.1 |
| |
|
| Serial1 |
| |
|
|
| v2/Dense |
| |
|
|
| 1 |
| |
|
|
| 30 |
| |
|
|
| 0.0.0.0 |
| |
|
|
| |
Address |
| |
|
| |
IP
address of the next hop router. |
| |
|
|
| |
Interface |
| |
|
| |
PIM
interface type and number. |
| |
|
|
| |
Version/Mode |
| |
|
| |
Configured PIM mode and version number for the interface. |
| |
|
|
| |
Neighbor Count |
| |
|
| |
Number of discovered PIM neighbors on this interface. |
| |
|
|
| |
Query Intvl |
| |
|
| |
Configured PIM query interval. |
| |
|
|
| |
DR |
| |
|
| |
Address of the designated router. Serial interfaces do not have a
designated router so this field is set to 0.0.0.0. |
| |
|
|
| |
B#show ip pim interface count |
| |
|
| |
Address |
| |
|
| Interface |
| |
|
|
| FS |
| |
|
|
| Mpackets In/Out |
| |
|
|
| |
172.16.4.2 |
| |
|
| Ethernet0 |
| |
|
|
| * |
| |
|
|
| 686/0 |
| |
|
|
| |
172.16.3.1 |
| |
|
| Serial1 |
| |
|
|
| * |
| |
|
|
| 738/0 |
| |
|
|
| |
FS |
| |
|
| |
*
indicates that fast switching is enabled |
| |
|
|
| |
Mpackets In/Out |
| |
|
| |
Number of multicast packets sent or received on the
interface. |
| |
|
|
| |
The
operation of PIM can be verified by executing the debug ip pim command: |
| |
|
| |
Badebug ip pim |
| |
|
| |
PIM
debugging is on: |
| |
|
| |
B# |
| |
| |
08:18:03: PIM: Send v2 Hello on Ethernet0 |
| |
| |
08:18:06: PIM: Received v2 Hello on Ethernet0 from
172.16.4.2 |
| |
| |
08:18:10: PIM: Received v2 Hello on Serial1 from
172.16.3.1 |
| |
| |
08:18:16: PIM: Send v2 Hello on Serial1 |
| |
| |
08:18:33: PIM: Send v2 Hello on Ethernet0 |
| |
| |
08:18:36: PIM: Received v2 Hello on Ethernet0 from
172.16.4.2 |
| |
| |
08:18:40: PIM: Received v2 Hello on Serial1 from
172.16.3.1 |
| |
| |
08:18:46: PIM: Send v2 Hello on Serial1 |
| |
|
| |
Notice that PIM queries to or from a particular neighbor are 30
seconds apart. This is the default query interval for PIM. |
| |
|
| |
References |
| |
|
| |
IETF
draft, “Protocol Independent Multicast Version 2 Dense Mode Specification,” S.
Deering et. al., 1998, draft-ietf-pim-v2-dm-01.txt | |
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