Within the Constructing a BGP Anycast Lab I described how you possibly can use customized configuration templates to increase the performance of netsim-tools.
That instance used Cisco IOS… however what if you wish to check the identical performance on a number of platforms? netsim-tools gives a pleasant trick: the customized configuration template may level to a listing with platform-specific templates. Let me present you the way that works…
We’ll begin with the BGP anycast topology, however change the lab units to a mixture of Cisco IOS, Arista EOS, and Cumulus VX:
- Most units will run Cisco IOSv
- One of many leaf switches and one of many anycast nodes will run Arista EOS
- One other anycast node will run Cumulus VX
Bodily lab topology
Lab topology definition
module: [ ospf, bgp ]
defaults.bgp.extra_attributes.node: [ anycast ]
bgp:
as_list:
65000:
members: [ l1, l2, l3, s1 ]
rr: [ s1 ]
65101:
members: [ a1,a2,a3 ]
defaults.gadget: iosv
nodes:
l1:
l2:
gadget: eos
l3:
s1:
a1:
a2:
gadget: eos
a3:
gadget: cumulus
hyperlinks: [ s1-l1, s1-l2, s1-l3, l2-a1, l2-a2, l3-a3 ]
Now for the multi-platform customized configuration trick: we’ll specify directories as a substitute of template file names in group config attributes (learn the BGP anycast weblog publish for extra particulars).
Utilizing directories as customized configuration templates
teams:
as65000:
config: [ bgp-addpath ]
as65101:
config: [ bgp-anycast ]
node_data:
bgp.anycast: 10.42.42.42/32
bgp.advertise_loopback: False
The remaining lab topology file is obtainable on GitHub.
We’ll have three information throughout the bgp-anycast listing: ios.j2, eos.j2 and cumulus.j2:
Customized configuration template for Cisco IOS (bgp-anycast/ios.j2)
{% if bgp is outlined and bgp.anycast is outlined %}
interface loopback 42
ip deal with {ipaddr('deal with') } {ipaddr('netmask') }
!
router bgp {{ bgp.as }}
address-family ipv4
community {ipaddr('deal with') } masks {ipaddr('netmask') }
{% endif %}
Customized configuration template for Arista EOS (bgp-anycast/eos.j2)
{% if bgp is outlined and bgp.anycast is outlined %}
interface loopback 42
ip deal with {{ bgp.anycast }}
!
router bgp {{ bgp.as }}
address-family ipv4
community {ipaddr('0') }
{% endif %}
Customized configuration template for Cumulus VX (bgp-anycast/cumulus.j2)
{% if bgp is outlined and bgp.anycast is outlined %}
interface lo
ip deal with {{ bgp.anycast }} label anycast
!
router bgp {{ bgp.as }}
address-family ipv4
community {ipaddr('0') }
{% endif %}
Ansible playbook printout generated through the lab initialization (utilizing netlab up -q command) shows the templates used to configure lab units – as you’ll be able to see, each platform makes use of a unique configuration template.
# ios_config: deploying bgp-anycast from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-anycast/ios.j2 ******************
* a1 - modified=True -- ---------------------------------------------
...
# eos_config: deploying bgp-anycast from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-anycast/eos.j2 ******************
* a2 - modified=True -- ---------------------------------------------
.....
# run vtysh to import bgp-anycast config from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-anycast/cumulus.j2 *********
* a3 - modified=True -- ---------------------------------------------
...
# ios_config: deploying bgp-addpath from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-addpath/ios.j2 ******************
* l1 - modified=True -- ---------------------------------------------
...
# eos_config: deploying bgp-addpath from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-addpath/eos.j2 ******************
* l2 - modified=True -- ---------------------------------------------
...
# ios_config: deploying bgp-addpath from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-addpath/ios.j2 ******************
* l3 - modified=True -- ---------------------------------------------
...
# ios_config: deploying bgp-addpath from /dwelling/pipi/net101/multi-platform/bgp-anycast/bgp-addpath/ios.j2 ******************
* s1 - modified=True -- ---------------------------------------------
Need to check this performance by yourself? Set up netsim-tools (and a bunch of different stuff), obtain the lab topology and customized configuration templates from GitHub, and execute netlab up.
