Month: March 2018

LAB VI: Multicast PIM Sparse mode

  • PIM Sparse Mode (PIM-SM) explicitly builds unidirectional shared trees rooted at a rendezvous point (RP) per group, and optionally creates shortest-path trees per source. PIM-SM generally scales fairly well for wide-area usage.

Packetcapture when generating traffic from the Video Server (R1) to the multicast group address

Connectivity via OSPF:

On all routers:
router ospf 1
 network area 0

R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set is subnetted, 1 subnets
O [110/21] via, 00:14:46, FastEthernet0/0 is subnetted, 1 subnets
O [110/20] via, 00:14:46, FastEthernet0/0 is subnetted, 1 subnets
C is directly connected, FastEthernet0/0 is subnetted, 1 subnets
O [110/30] via, 00:14:46, FastEthernet0/0

Multicast configuration:

On all routers:
# Enable Multicast routing
ip multicast-routing

#Enable PIM Sparse-mode on the interfaces
R1(config)#int fa0/0
R1(config-if)#ip pim sparse-mode
R1(config)#int fa0/1
R1(config-if)#ip pim sparse-mode

#Add RP address
ip pim rp-address


300-320 ARCH resource list

Designing for Cisco Network Service Architectures (ARCH) Foundation Learning Guide: CCDP ARCH 300-320, 4th Edition:

CCDP 300-320 videos courses:

Cisco Design Webinars:

Cisco Arch Study Material:

Cisco Design Zone:

Books / PDF


Cisco Guides:

Various Resources:

Cisco Live:

  • Enterprise Campus Design: Multilayer Architectures and Design Principles – BRKCRS-2031
  • WAN Architectures and Design Principles – BRKRST-2041
  • Campus Wired LAN Deployment Using Cisco Validated Designs – BRKCRS-1500
  • Campus QoS Design-Simplified – BRKCRS-2501
  • OSPF Deployment in Modern Networks – BRKRST-2337
  • EIGRP Deployment in Modern Networks – BRKRST-2336
  • Advanced – Scaling BGP – BRKRST-3321
  • Nexus Multicast Design Best Practices – BRKIPM-3062
  • Cisco FabricPath Technology and Design – BRKDCT-2081
  • Advanced Enterprise Campus Design: Converged Access – BRKCRS-2888
  • Cisco Unified Contact Center Enterprise Planning and Design – BRKCCT-2007


Lab V ( Nexus7k, Overlay Transport Virtualization )

OTV: Overlay Transport Virtualization

OTV(Overlay Transport Virtualization) is a technology that provide layer2 extension capabilities between different data centers.
n its most simplest form OTV is a new DCI (Data Center Interconnect) technology that routes MAC-based information by encapsulating traffic in normal IP packets for transit.

  • Transparent workload mobility
  • Business resiliency
  • Superior computing resource efficiencies
Overlay InterfaceLogical OTV Tunnel interfaceinterface Overlay1
OTV Join InterfaceThe physical link or port-channel that you use to route upstream towards the datacenter interconnectotv join-interface Ethernet2/1
OTV Control GroupMulticast address used to discover the remote sites in the control plane.otv control-group
OTV Data GroupUsed for tunneling multicast traffic over the OTV in the dataplaneotv data-group
Extend VLANsVLANs that will be tunneled over OTV.otv extend-vlan 100
Site VLANUsed to synchronize the Authoritative Edge Device (AED) role within an OTV site. otv site-vlan 999
Site IdentifierShould be unique per Datacenter. Used in AED Election.otv site-identifier 0x1


Cisco: OTV Quick Start Guide

Cisco: NX-OS OTV Configuration Guide

Cisco: OTV Best Practices

Cisco: OTV Whitepaper

OTV Encapsulation

OTV adds a further 42 bytes on all packets traveling across the overlay network. The OTV Edge device removes the CRC and 802.1Q fields from the original Layer2 frame. It then adds an OTV Shim Header which includes this 802.1Q field (this includes the priority P-bit value) and the Overlay ID information. It also includes an external IP header for the transport network. All OTV packets have Don’t Fragment (DF) bit set to 1 in the external IP header.