Page Comparison

...

Exercise 2

Routing With BGP

Step 1

View Internet Router

Step 2

Connect BGP Peers

Step 3

Advertise BGP Routes

Step 4

Redistribute Services into BGP

Step 5

View Internet Router

show bgp summary

show ip route bgp

Code Block

title	show bgp routes
collapse	true

internet-router# show bgp summary 

IPv4 Unicast Summary:
BGP router identifier 192.168.7.101, local AS number 6000 vrf-id 0
BGP table version 6
RIB entries 11, using 1672 bytes of memory
Peers 3, using 62 KiB of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
1.1.1.128       4        100      24      24        0    0    0 00:09:12            0
2.2.2.128       4        200      21      21        0    0    0 00:07:58            0
3.3.3.128       4        300      30      30        0    0    0 00:12:20            3

Total number of neighbors 3
internet-router# show ip route bgp 
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR,
       > - selected route, * - FIB route

B>* 128.128.128.1/32 [20/1000000] via 3.3.3.128, dc, 00:04:27
B>* 128.128.128.128/32 [20/1000000] via 3.3.3.128, dc, 00:04:27
B>* 172.26.128.0/30 [20/0] via 3.3.3.128, dc, 00:05:49
internet-router#

Exercise 3

Routing Filters and Policies

Step 1

Add AS Path

show bgp

Code Block

title	prepend 200 200 200 200
collapse	true

admin@node2.bosdc1# show bgp 
Thu 2021-05-06 20:55:10 UTC
BGP table version is 12, local router ID is 3.3.3.128, vrf id 0
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 1.1.1.0/24       3.3.3.1                  0             0 6000 i
*> 2.2.2.0/24       3.3.3.1                  0             0 200 200 200 200 6000 i
*> 3.3.3.0/24       3.3.3.1                  0             0 6000 i
*> 128.128.128.1/32 0.0.0.0            1000000         32768 ?
*> 128.128.128.128/32
                    0.0.0.0            1000000         32768 ?
*> 172.26.128.0/30  0.0.0.0                  0         32768 i

Displayed  6 routes and 6 total paths


Completed in 0.16 seconds
admin@node2.bosdc1#

Step 2

Add Community String

1- Create a Filter

2- Policy

2a- Condition

2b- Actions

SSR

Code Block

title	show bgp router
collapse	true

admin@node1.nycconductor1# show bgp router all 172.26.128.0
Thu 2021-05-06 21:05:58 UTC
WARNING: Targeting router 'all' may take a long time. Continue anyway? [y/N]: y
========
 bosdc1
========
BGP routing table entry for 172.26.128.0/30
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  3.3.3.1
  Local
    0.0.0.0 from 0.0.0.0 (3.3.3.128)
      Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
      Community: 128:128
      AddPath ID: RX 0, TX 11
      Last update: Thu May  6 21:05:08 2021

on FRR

show bgp ipv4 172.26.128.0/30

Code Block

title	show bgp <route> on FRRouting
collapse	true

internet-router# show bgp ipv4 172.26.128.0/30
BGP routing table entry for 172.26.128.0/30
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  1.1.1.128 2.2.2.128 3.3.3.128
  300
    3.3.3.128 from 3.3.3.128 (3.3.3.128)
      Origin IGP, metric 0, localpref 100, valid, external, best
      Community: 128:128
      AddPath ID: RX 0, TX 8
      Last update: Thu May  6 21:05:29 2021

internet-router#

Step 3

Reject Community String

Exercise 4BGP Over SVRStep 1Configure Routing InterfaceStep 2Change Router Instance to Routing InterfaceStep 3Add BGP Over SVR PeersStep 4Add BGP Over SVR PeersStep 5Verify BGP Over SVR

1- Create a Filter: match-community

2- Policy

2a- Condition

2b- Actions

show bgp router dalbo2

show bgp router seabo1

Code Block

title	show bgp router <router>
collapse	true

admin@node1.nycconductor1# show bgp router dalbo2 
Thu 2021-05-06 21:36:34 UTC
========
 dalbo2
========
BGP table version is 9, local router ID is 2.2.2.128, vrf id 0
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 1.1.1.0/24       2.2.2.1                  0             0 6000 i
*> 2.2.2.0/24       2.2.2.1                  0             0 6000 i
*> 3.3.3.0/24       2.2.2.1                  0             0 6000 i
*> 128.128.128.1/32 2.2.2.1                                0 6000 300 ?
*> 128.128.128.128/32
                    2.2.2.1                                0 6000 300 ?

Displayed  5 routes and 5 total paths


Completed in 0.12 seconds
admin@node1.nycconductor1# show bgp router seabo1 
Thu 2021-05-06 21:36:47 UTC
========
 seabo1
========
BGP table version is 8, local router ID is 1.1.1.128, vrf id 0
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 1.1.1.0/24       1.1.1.1                  0             0 6000 i
*> 2.2.2.0/24       1.1.1.1                  0             0 6000 i
*> 3.3.3.0/24       1.1.1.1                  0             0 6000 i
*> 128.128.128.1/32 1.1.1.1                                0 6000 300 ?
*> 128.128.128.128/32
                    1.1.1.1                                0 6000 300 ?
*> 172.26.128.0/30  1.1.1.1                                0 6000 300 i

Displayed  6 routes and 6 total paths


Completed in 0.12 seconds
admin@node1.nycconductor1#

Versions Compared

Old Version 4

New Version Current

Key