multicast overview
TRANSCRIPT
111© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
2© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Multicast Overview
Thom Bryant
June 2003
33© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Introduction
• Consistent design recommendation
• Simplification and optimization
CLI and code level
• Quality of Cisco IOS® Software
E2E system testing
Financial test lab
44© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
• Internet Technologies Division (ITD) – Central IOS Engineering
• Chief Technology Office (CTO) – Corporate Consulting Engineering
• Customer Advocacy (CA) – Advanced Services
• High Speed Switching Business Unit (HSSBU) – Financial Test Labs
• Network Management Business Unit (NMBU) – Network Management
Cisco Representation
55© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Brief Review–Protocol Independent Multicast MDT Types
• Protocol Independent Multicast (PIM) Sparse-ModeAny version IGMP
SPT or RPT
Unidirectional Trees
MSDP for Inter-domain/Redundancy
• PIM SSMIGMP V3
Source-Only Trees
Simplest Multicast Model – No RPs or MSDP
Unidirectional Trees
• Bidirectional PIMAny version IGMP
Bidirectional Trees-Only (*,G) Routing State
66© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
77© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
INNOVATIONINNOVATION
Self-Healing
Adaptive Routing
Storage Awareness
Self-Healing
Adaptive Routing
Storage Awareness
QoS-Based RoutingQoS-Based Routing
MPLS-VPNsMPLS-VPNsMobile IPMobile IPAToMAToM
Multicast IPMulticast IPNetFlowNetFlow
IPsecIPsec
In-Service-Software-UpgradesIn-Service-Software-Upgrades
Intrusion DetectionIntrusion Detection
IP version 6IP version 6 nBARnBAR
Traffic EngineeringTraffic Engineering Cisco IOS FirewallCisco IOS Firewall SAASAA
Integration: Making IP InnovationBusiness Ready
Application Awareness
Integrated Security
Multicast
Application Awareness
Integrated Security
Multicast
Nonstop ForwardingNonstop Forwarding
Mobility
Packet Core
Expanded Addressing
Mobility
Packet Core
Expanded Addressing
88© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Multicast VPN : MVPN Multicast VPN : MVPN
Many-to-Many : PIM – Bi-DirectionalMany-to-Many : PIM – Bi-Directional
One-to-Many : SSM & IGMP v3One-to-Many : SSM & IGMP v3
Inter-Domain Multicast : MBGP , MSDP, Anycast RP, RGMP, BSRInter-Domain Multicast : MBGP , MSDP, Anycast RP, RGMP, BSR
Reliable Multicast : PGMReliable Multicast : PGM
Basic Multicast : PIM SM, DM, Auto RP, IGMP v2, CGMPBasic Multicast : PIM SM, DM, Auto RP, IGMP v2, CGMP
Multicast v6 : PIM SM, SSM, MLD v2Multicast v6 : PIM SM, SSM, MLD v2
MANAGEMENT
MANAGEMENT
INTEGRATION
INTEGRATION
Provisioning / Accounting / Monitoring Provisioning / Accounting / Monitoring
Access Control / Security Access Control / Security
Multicast Automation / SimplificationMulticast Automation / Simplification
Multicast: Components
99© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Multicast: It Begins and Ends with Applications
1 IP/TV® Audio/Video http://www.cisco.com/warp/public/cc/so/neso/cxne/atsln_an.htm
2 Windows Media
Audio/Video http://www.microsoft.com/windows/windowsmedia/serve/multiwp.asp
3 Real Audio/Video http://videocast.nih.gov/McastUpgrade/multicast.html
4Dialer Conferencing
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/winxppro/proddocs/dialer_conference_overview.asp
5 NetMeeting Conferencing http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/win98/reskit/part4/wrkc20.asp
6 HootNHoller VOIP http://www.cisco.com/warp/public/cc/so/neso/vvda/hthllr/
7 IPblue VOIP http://www.ipblue.com/faq.htm
8 TIBCO Stock ticker http://www.tibco.com/resources/solutions/technology_solutions/messaging.pdf
9 OrbixTalk Messaging http://techrepublictk.cnet.com/enterprise/0-6119584-720-7723923.html
10 Norton Ghost
File Transferhttp://www.symantec.com/sabu/ghost/ghost_personal/
11 Datarunner File Transfer http://www.targetvision.com/distribu.htm
1010© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Finance: Trading FloorsRecent Trends
• Many large financial traders are interested in reducing Operational Expenses (OpEx) and are increasingly interested in Hoot ‘n’ Holler for existing IP infrastructure
• Bidirectional PIM is the protocol that enables a scalable solution, and is going to be deployed in many of these networks
Prudential was our beachhead and is very happy with the cost savings
Royal Bank of Canada is also in the process of deploying Hoot ’n Holler
• Increased interest in PGM for reliable Multicast delivery
• Increased interest in faster convergence and lower downtime for all business critical multicast services
1111© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
IP Multicast Strategy
• Business Strategy
Maintain leadership in the finance market
Increase deployment in enterprise market segment
Drive adoption in the ISP market segment
Facilitate deployment in MXU for new Multicast services
• Technology Strategy
Maintain IP multicast technology leadership
Add hardware acceleration support and achieve consistency on all key Cisco platforms
Integrate Multicast across different technologies like MPLS, IPsec, IPv6, Mobile, NetFlow and content
Simplify, automate, and increase deployment of Multicast
Enhance scalability, manageability, and security
1212© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
IP Multicast Platform Roadmap Release Plan (Release 12.0S, 12.2T, and 12.2S)
Key Features:
• mVPN support on GSR
•Multicast v6 – Phase 1 SM, SSM, MLD v2
• New dMFIB for v6
• MBGP support for mcast v6
Targeting Cisco IOS Software Release
12.3(1)T
Key Features:
• Multicast v6 - Phase 1 SM, SSM, MLD v2
• New MFIB for v6
• SSM Mapping
• IP-Mroute-STD MIB
• Multicast Netflow
• Bi-Dir support on C7600
Key Features:
• MSDP Spec 14 compliance
• Inter-AS for mVPN
• SSM Mapping
• Auto-RP Enhancements (no Dense mode fallback)
Targeting Cisco IOS Software Release
12.0(26)S
Targeting Cisco IOS Software Release
12.2(3rd)S
Targeting Cisco IOS Software Release
12.0(27)S
Targeting Cisco IOS Software Release
12.2(5th)S
Key Features:
• Mcast-v6 Phase 2
• New dMFIB for v6
• Extranet for mVPN
• Inter-AS for mVPN
• PGM Aware VRF •Auto-RP Enhancements (no Dense mode fallback)
• MSDP Spec 14 compliance
• mVPN MIB
Key Features:
• Multicast v6 - Phase 1 SM, SSM, MLD v2
• New MFIB for v6
• SSM Mapping
• IP-Mroute-STD MIB
• Multicast Netflow
Jul2004
May2004
Jun2004
Apr2004
Mar2004
Feb2004
Jan2004
Dec2003
Nov2003
Oct2003
Sep2003
Aug2003
Jul2003
Jun2003
May2003
Apr2003
Mar2003
Feb2003
Aug2004
NB. Confirm target releases with Cisco IOS PM – [email protected]
1313© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
1414© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Address Allocation Considerations
• Current and future size of the organization
• Organizational structure and relations between Business Units
• Scale of the IP Multicast deployment
• Internal policies on the control and deployment of network applications
• Scope of the applications
• Security policy
• Readiness for future use of new multicast delivery methods (ie: Bi-Dir PIM and SSM)
1515© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
IP Multicast Address Space
Start Range End Range Description224.0.0.0 - 224.2.255.255 Assigned224.252.0.0 - 224.255.255.255 Assigned225.0.0.0 - 231.255.255.255 RESERVED232.0.0.0 - 232.255.255.255 Source Specific Multicast Block233.0.0.0 - 233.255.255.255 GLOP Block234.0.0.0 - 238.255.255.255 RESERVED239.0.0.0 - 239.255.255.255 Administratively Scoped Block
IP v4 multicast addresses assigned by IANA
239.0.0.0 - 239.255.255.255 Administratively Scoped [IANA,rfc2365] 239.0.0.0 - 239.191.255.255 Reserved [IANA]239.192.0.0 - 239.251.255.255 Organization-Local Scope [Meyer,rfc2365]239.252.0.0 - 239.254.255.255 Site-Local Scope(reserved)[Meyer,rfc2365]239.255.0.0 - 239.255.255.255 Site-Local Scope [Meyer,rfc2365] 239.255.2.2 rasadv [Thaler]
Administratively scoped IP Multicast address recommendations from rfc 2365
1616© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Geographical Scoped Addresses Example
Byte 4
Byte3 Byte2 Byte1 Notes
239 * * * * * * * * * * * * * * * * * * * * * * * * Administrative Scope range RFC2365
239 1 1 * * * * * * * * * * * * * * * * * * * * * * Administrative Organization range RFC2365
239 1 1 0 0 0 0 0 0 * * * * * * * * * * * * * * * * Adm Org. Global addresses
239 1 1 0 0 0 0 0 1 * * * * * * * * * * * * * Adm. Org. Regional assignment
239 * * * * * * * * * * * * * Adm. Org. Regional assignment
• Uses three levels of geographical scoping: Site local
Regional by using the Regional bits
Global
239 255 * * * * * * * * * * * * * Adm. Local Range RFC2365
* * *
* * *1 1 1 1 1 1 1 0
* * *
1717© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Geographical and Bandwidth Scoped Addresses Example
Byte 4
Byte3 Byte2 Byte1 Notes
239 * * * * * * * * * * * * * * * * * * * * * * * * Administrative Scope range RFC2365
239 1 1 * * * * * * * * * * * * * * * * * * * * * * Administrative Organization range RFC2365
239 1 1 R R R R R R * * * * * * * * * * * * * * * * Adm. Org. Region expansion
239 1 1 R R R R R R B B B * * * * * * * * * * * * * Adm. Org. Region/BW expansion
239 255 * * * * * * * * * * * * * * * * Administrative Local range RFC2365
239 255 B B B * * * * * * * * * * * * * Adm. Local Bandwidth expansion
• Uses three levels of geographical scoping: Site local
Regional by using the Regional bits
Global
• Use bandwidth bits to define bandwidth scoping in the network
1818© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Bandwidth Scoping Example
Bandwidth Bits
Bandwidth Level
#3rd Octet range
Access Lists
0 * *Unlimited Bandwidth
0-127ip access-list standard unlimitedbw permit 239.0.0.0 0.255.255.255
1 0 * High Bandwidth
128-191 ip access-list standard highbw permit 239.0.128.0 0.255.127.255
1 1 0Medium
Bandwidth192-223
ip access-list standard mediumbw permit 239.0.192.0 0.255.63.255
1 1 1Low
Bandwidth224-255 ip access-list standard lowbw
permit 239.0.224.0 0.255.31.255
1919© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
CampusBackbone
Server Farm
Core
To regionalbackbone
To branch offices (T3)
To remote users(DSL/Cable)
Distribution
ip multicast boundary lowbw
ip multicast boundary mediumbw
ip multicast boundary highbw
Bandwidth Scoping
2020© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
2121© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Auto-RP Overview
Announce Announce
An
no
un
ceA
nn
ou
nce
Announce Announce
An
no
un
ceA
nn
ou
nce
Announce
RP-Announcements multicast to theCisco Announce (224.0.1.39) group
AA
CC DDCandidate RP
1.1.1.1Candidate-RP
2.2.2.2
BB
MappingAgent
MappingAgent
2222© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
CC DD
Discovery
RP-Discoveries multicast to theCisco Discovery (224.0.1.40) group
MappingAgent
MappingAgent
Discovery
Discovery
Dis
cove
ry
Dis
cove
ry
AA
Discovery
Discovery
Dis
cove
ry
Dis
cove
ry
BB
Candidate RP1.1.1.1
Candidate-RP2.2.2.2
Auto-RP Overview
2323© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
PIM Sparse Mode
PIM Sparse Mode
RP/Mapping AgentC D
A B
On each router: ip multicast-routing
On each interface: ip pim sparse-dense-mode
On routers B and C: ip pim send-rp-announce loopback0 scope 16ip pim send-rp-discovery loopback0 scope 16
RP/Mapping Agent
Simple Auto-RP Configuration
2424© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Configuring an Interface for IP Multicast
• Interface Mode Configuration CommandEnables multicast forwarding on the interface
Controls the interface’s mode of operation
ip pim sparse-dense-mode
• Interface mode is determined by the Group modeDense: interface operates in Dense mode
Sparse: interface operates in Sparse mode
• Sparse-dense-mode has potential issues
• Multicast data flows can be flooded as Dense mode if the RP information is lost
• Auto-RP has always required sparse-dense-mode – until now
2525© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
New Command: Auto-RP Listener
• Global Command
ip pim autorp listener
Allows Auto-RP to work over Sparse-mode interfaces
• Enables AutoRP functions on router.
AutoRP groups operate only in DM
Router joins 224.0.1.40
Off by default
Future: may change to “On” by default
• No possibility of Dense mode flooding without multiple failures in network
2626© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Coming Soon to a Router Near You….
• No Dense mode fallback
Default behavior.
No new command required
Use current “Last resort RP=0.0.0.0” approach
Provides limited “disabled group” functionality
2727© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Future Plans
• ‘ip pim autorp mapping-agent’ command
New “clearer” parser command
Helps standardize AutoRP & BSR commands
• Format
ip pim autorp mapping-agent <interface> scope <ttl>
• No new code required
Same function as old command
2828© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Implementation Summary
ip pim autorp listener
ip pim autorp candidate-rp <interface> scope <ttl>
ip pim autorp mapping-agent <interface> scope <ttl>
ip pim bsr listener
ip pim bsr candidate-bsr [priority <pri>] [hash-length]
ip pim bsr candidate-rp <interface> scope <ttl>
ip pim bsr border
2929© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
3030© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
RP Redundancy Agenda
• Sparse Mode Redundant RPs
• Bidirectional Redundant RPs
• Unified Redundant RPs
3131© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Goals
• Topology independent RP redundancy
• Unified model for Sparse mode and Bidirectional RPs
• Simple configuration
3232© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Sparse Mode Anycast RP Configuration
ip pim rp-address 10.0.0.1 ip pim rp-address 10.0.0.1
Interface loopback 0 ip address 10.0.0.1 255.255.255.255
Interface loopback 1 ip address 10.0.0.2 255.255.255.255!ip msdp peer 10.0.0.3 connect-source loopback 1ip msdp originator-id loopback 1
Interface loopback 0 ip address 10.0.0.1 255.255.255.255
Interface loopback 1 ip address 10.0.0.3 255.255.255.255!ip msdp peer 10.0.0.2 connect-source loopback 1ip msdp originator-id loopback 1
MSDPMSDPBB
RP2
AA
RP1
XX YY
3333© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Topology Dependant RP Redundancy
A B
Anycast RP(w w/o) MSDP!!
FE0
FE1
+10 +20
+30
• Router ‘A’ is the primary RP, router ‘B’ is failover
• ‘FE0’ is primary network, ‘FE1’ is failover
• Modify link metrics on ‘A’ and ‘B’ to force routing
• Anycast-RP just for failover, not for load-balancing
• Topology dependant, as ‘B’ can’t be on the path to ‘A’
3434© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Bidirectional Phantom RP on a LAN
Source Receiver
1.1.1.21.1.1.3
RP: 1.1.1.1
e0/0 e0/0
e1/0 e1/01.1.3.1 1.1.2.2
core1#show ip pim int e1/0 df
Interface RP DF Winner Metric UptimeEthernet1/0 1.1.1.1 1.1.3.3 0 00:06:49core1#
core2#show ip mroute 225.1.2.3
(*, 225.1.2.3), 00:06:43/00:00:00, RP 1.1.1.1, flags: BC Bidir-Upstream: Ethernet0/0, RPF nbr 1.1.1.1 Outgoing interface list: Ethernet1/0, Forward/Sparse, 00:06:43/now Ethernet0/0, Bidir-Upstream/Sparse, 00:06:43/00:00:00
core2#
3535© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Bidirectional Floating Route Phantom RP
RP: 1.1.1.1P
ip multicast-routing!interface Loopback0 ip address 11.0.0.1 255.255.255.255 ip pim sparse-mode!router ospf 11 redistribute static subnets network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip route 1.1.1.1 255.255.255.255 Loopback0ip pim bidir-enableip pim rp-address 1.1.1.1 bidir-grp bidir
S
ip multicast-routing!interface Loopback0 ip address 11.0.0.2 255.255.255.255 ip pim sparse-mode!router ospf 11 redistribute static subnets network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip route 1.1.1.0 255.255.255.254 Loopback0ip pim bidir-enableip pim rp-address 1.1.1.1 bidir-grp bidir
3636© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Unified Floating Route Phantom RP(Netmask Method)
RP: 1.1.1.2
P
ip multicast-routing!interface Loopback0 ip address 1.1.1.1 255.255.255.252 ip pim sparse-mode ip ospf network point-to-point!router ospf 11 network 1.1.1.0 0.0.0.3 area 0 network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip pim bidir-enableip pim rp-address 1.1.1.1 sm-grpip pim rp-address 1.1.1.2 bidir-grp bidir
S
ip multicast-routing!interface Loopback0 ip address 1.1.1.1 255.255.255.248 ip pim sparse-mode ip ospf network point-to-point!router ospf 11 network 1.1.1.0 0.0.0.7 area 0 network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip pim bidir-enableip pim rp-address 1.1.1.1 sm-grpip pim rp-address 1.1.1.2 bidir-grp bidir
3737© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Unified Floating Route Phantom RP(Conditional Routing Method)
RP: 1.1.1.2
P
ip multicast-routing!interface Loopback0 ip address 1.1.1.1 255.255.255.252 ip pim sparse-mode ip ospf network point-to-point!router ospf 11 network 1.1.1.0 0.0.0.3 area 0 network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip pim bidir-enableip pim rp-address 1.1.1.1 sm-grpip pim rp-address 1.1.1.2 bidir-grp bidir
S
ip multicast-routing!interface Loopback0 ip address 1.1.1.1 255.255.255.252 ip pim sparse-mode ip ospf network point-to-point [conditional]!router ospf 11 network 1.1.1.0 0.0.0.3 area 0 [conditional] network 10.1.1.0 0.0.0.255 area 0 network 10.1.2.0 0.0.0.255 area 0!ip pim bidir-enableip pim rp-address 1.1.1.1 sm-grpip pim rp-address 1.1.1.2 bidir-grp bidir
3838© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
3939© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
0
50
100
Multicast Sub-Second Convergence
Multicast convergence
Time
Previous Environment
Multicast Sub-SecondConvergence
Time
12000
10000
6500
7500
25
75
Seconds
Sub-SecondConvergenc
e
Multicast Sub-Second Convergence provides almost instantaneous recovery of Multicast paths following unicast routing recovery
Platforms
4040© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Multicast Scalability - Issues
• Maintaining large amount of state
• Dealing with PIM protocol updates
• Periodic updates to refresh state
• Timers to maintain state
Passive timers
Managed timers
Active timers (timer wheel)
4141© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Multicast Sub-Second Convergence
• Enhancement: deliver sub-second convergence and world-class reliability for business-critical multicast applications.
• Problem: reduce the time it takes for Multicast routing to converge after a failure in a large network
• Solution
1. Make Triggered RPF Checks
2. Enhance Timer Management
3. Enhance IGMP Capabilities
4. Make Designated Router Failover in 300 msec
5. Decrease Join/Prune Forwarding Handle Times
6. Make Join/Prune Aggregation
4242© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
• Join/Prune aggregationUsed to send one PIM packet per (S,G) or (*,G) entry after a Rendezvous Point failover
These are now aggregated into a few PIM packets with multiple entries
• New PIM HELLO optionNew option advertises the hold time in milliseconds
Enables sub-second failover of Designated Router (Cisco proprietary)
• Triggered RPF checks Follows unicast convergence
After unicast is converged, it causes an instantaneous start of RPF checks (previous default was five seconds)
ip pim query-interval <interval> [msec] ip pim query-interval <interval> [msec]
Multicast Sub-Second Convergence: CSCdw13674 PIM scalability & convergence
4343© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Agenda
• Trends and roadmap
• Addressing and scoping
• Interface Configuration Mode/Auto-RP Listener
• RP Redundancy
• PIM scalability/convergence
• Summary
• Open discussion
4444© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Updated Design Guidance - Summary
• Interface Config ModePIM Sparse Mode
Auto-RP Listener
• RP Mapping and DiscoveryStatic for Deterministic/Change-averse Networks
Auto-RP when a dynamic protocol is needed
• Administrative ScopingStatic
IP Multicast Boundary Filter-Autorp
• RP PlacementCore by default
• RPT or SPT
4545© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Updated Design/Reference Documents
• Design Guidelines Update
• Bidirectional Design Guide
• Guidelines for Enterprise IP Multicast Address Allocation
• E2E Test Results
• Multicast VPN Design Guide
• Security (coming soon)
4646© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03
Possible Additional Topics
• Multicast VPN
• Multicast Netflow
• Multicast v6
• Reliable Multicast - PGM
• Multicast Security
• Multicast Management and tools
• E2E System Test Results for 12.1(13)
• Financial Test Lab Enhancements
4747© 2003, Cisco Systems, Inc. All rights reserved.IP Multicast, 6/03