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JNCIP-ENT lab 6 of 19

BGP load balancing and IPv6

Spread traffic across parallel links, routers and ISPs with multihop, multipath and a forwarding table policy, then add IPv6 to BGP on a new session and on an existing IPv4 one.

Run this lab

It needs Standard: its 5 nodes are set to 11 vCPU and 11,776 MB in total.

In your workspace: Shared, then JNCIP-ENT JN0-650 guided labs, then 06 - BGP load balancing and IPv6

Run it on Standard from £5 a day

The free demo can’t run it: it has 6 vCPU and 8 GB, and this lab’s nodes need 11 vCPU and 11,776 MB together. Every lab plan includes every guided lab.

Level
Advanced
Time
About 80 minutes
Nodes need
11 vCPU, 11,776 MB
Smallest plan
Standard

The scenario

R1 is Northmere's internet edge, with a lot of bandwidth that it isn't using. It has two links to ISP1, one to ISP2 and one to ISP3, and BGP sends each destination down one link at a time. You'll spread that traffic, first across the two links to one router, then across routers in one AS, and then across different ASs. You'll also add IPv6 to BGP in two ways.

All three ISPs originate 203.0.113.0/24, a content network. ISP2 also originates 2001:db8:f0::/48.

DeviceInterfaceAddress
R1ge-0/0/0, lo010.0.12.1/30, 2001:db8:12::1/64, 10.255.0.1/32, 2001:db8:255::1/128
R1ge-0/0/1, ge-0/0/2198.18.11.1/30, 198.18.12.1/30, to ISP1 at .2
R1ge-0/0/3198.18.13.1/30, 2001:db8:13::1/64, to ISP2 at .2 and ::2
R1ge-0/0/4198.18.14.1/30, to ISP3 at .2
R2ge-0/0/0, lo010.0.12.2/30, 2001:db8:12::2/64, 10.255.0.2/32, 2001:db8:255::2/128
ISP1Lo0198.18.255.1/32

OSPF and OSPFv3 run between R1 and R2. The iBGP session and the eBGP sessions to ISP2 and ISP3 are up. The session to ISP1 isn't: ISP1 expects to peer between loopbacks.

What you’ll practise

  • Peer between loopbacks with multihop
  • Load-balance with a forwarding table export policy
  • Use multipath and multipath multiple-as
  • Configure the inet6 NLRI family
  • Solve the IPv4-mapped next hop problem

The tasks

  1. Peer between loopbacks with multihop
  2. Program all the next hops into the forwarding table
  3. Share across two routers with multipath
  4. Share across different ASs
  5. Add an IPv6 eBGP session
  6. Carry IPv6 over the IPv4 iBGP session

The Lab Tasks pane has the scenario, these tasks, the checks to run, hints and the full solution.

Topology and devices

The network as it opens in EVE-NG, drawn from the lab’s own canvas, and the image each node runs.

Topology of BGP load balancing and IPv65 nodes, 5 links. Every link is listed as text below the diagram.R1R2ISP1ISP2ISP3ge-0/0/0ge-0/0/0ge-0/0/1Gi0/0ge-0/0/2Gi0/1ge-0/0/4Gi0/0ge-0/0/3Gi0/0
5 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 ge-0/0/0 to R2 ge-0/0/0
  • R1 ge-0/0/1 to ISP1 Gi0/0
  • R1 ge-0/0/2 to ISP1 Gi0/1
  • R1 ge-0/0/3 to ISP2 Gi0/0
  • R1 ge-0/0/4 to ISP3 Gi0/0
Nodes in BGP load balancing and IPv6, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
R1Juniper vJunos-routervjunosrouter-24.2R1-S2.54 vCPU, 5,120 MB
R2Juniper vJunos-routervjunosrouter-24.2R1-S2.54 vCPU, 5,120 MB
ISP1Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB
ISP2Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB
ISP3Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB

How to open this lab

  1. Sign in to your workspace at lab.cloudlabbox.com.

  2. In File Manager, open Shared, then the folder JNCIP-ENT JN0-650 guided labs.

  3. Open 06 - BGP load balancing and IPv6 and start its nodes, then open Lab Tasks for the scenario and the steps.

The lab is read-only. You can start the nodes and configure the devices, but changes to the topology can’t be saved. To change it, rebuild it in your own folder.

More JNCIP-ENT labs

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CloudLabBox is independent of Cisco and Juniper Networks. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.