Cisco Catalyst 2960-XR Configuration Guides

Information About PIM
PIM is protocol-independent: regardless of the unicast routing protocols used to populate the unicast routing
table, PIM uses this information to perform multicast forwarding instead of maintaining a separate multicast
routing table.
PIM is defined in RFC 2362, Protocol-Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification.
PIM is defined in these Internet Engineering Task Force (IETF) Internet drafts:
•
Protocol Independent Multicast (PIM): Motivation and Architecture
•
Protocol Independent Multicast (PIM), Dense Mode Protocol Specification
•
Protocol Independent Multicast (PIM), Sparse Mode Protocol Specification
•
draft-ietf-idmr-igmp-v2-06.txt, Internet Group Management Protocol, Version 2
•
draft-ietf-pim-v2-dm-03.txt, PIM Version 2 Dense Mode
PIM Versions
PIMv2 includes these improvements over PIMv1:
•
A single, active rendezvous point (RP) exists per multicast group, with multiple backup RPs. This single
RP compares to multiple active RPs for the same group in PIMv1.
•
A bootstrap router (BSR) provides a fault-tolerant, automated RP discovery and distribution function
that enables routers and multilayer switches to dynamically learn the group-to-RP mappings.
•
Sparse mode and dense mode are properties of a group, as opposed to an interface.
We strongly recommend using sparse-dense mode as opposed to either sparse mode or
dense mode only.
Note
•
PIM join and prune messages have more flexible encoding for multiple address families.
•
A more flexible hello packet format replaces the query packet to encode current and future capability
options.
•
Register messages sent to an RP specify whether they are sent by a border router or a designated router.
•
PIM packets are no longer inside IGMP packets; they are standalone packets.
PIMv1 and PIMv2 Interoperability
To avoid misconfiguring multicast routing on your switch, review the information in this section.
The Cisco PIMv2 implementation provides interoperability and transition between Version 1 and Version 2,
although there might be some minor problems.
You can upgrade to PIMv2 incrementally. PIM Versions 1 and 2 can be configured on different routers and
multilayer switches within one network. Internally, all routers and multilayer switches on a shared media
Catalyst 2960-XR Switch IP Multicast Routing Configuration Guide, Cisco IOS Release 15.0(2)EX1
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Configuring PIM
Information About PIM

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C