
Ø
SLA
Stands for Service Level Agreement
Ø
Allow
us to understand the health of the
network along with particular route
Ø
Also
allow us to automatically forwards the traffic if one ISP is down to other ISP
if we have redundant ISP Connections
Ø
In
this scenario we have two ISP Connection coming to our Enterprise Network
1st Step: - IP-SLA Configuration:-
Ø
Ping
200.200.200.1 {ISP1}
Ø
Ping
200.200.200.5 {ISP2} {Check the
connectivity}
Ø
R1(config)#ip
sla 1 {1:- SLA entry Number}
Ø
R1(config-ip-sla)#icmp-echo
200.200.200.1 {ISP1 ip address}
Ø
R1(config-ip-sla-echo)#timeout
200 {milliseconds}
Ø
R1(config-ip-sla-echo)#frequency
1 {Second}
Ø
R1(config-ip-sla-echo)#threshold
300 {milliseconds}
Ø
R1(config-ip-sla-echo)#exit
ü
200.200.00.1:-
What is IP address we wana ping
ü
icmp-echo:
- Using Ping
ü
Timeout:-how long we wana wait for Ping response back {or consider
ping lost}
ü
Frequency:-how many seconds we sending the ping
ü
Threshold:-how long until we consider that device down
2nd Step:- Now Start the SLA
Ø
R1(config)#ip
sla schedule 1 start-time now life forever
ü
1:-SLA entry number
3rd Step: - To Make Routing Decision Respond to the SLA {entry
or probe}
Ø
R1(config)#track
1 rtr 1
Ø
R1(config-track)#exit
ü
1:-Track Object number
ü
rtr:- Response
Time Reporter (RTR) Previous name of IP-SLA
ü
1:-
entry number
Track object take the SLA entry and
essentially says the ip address/interface is up or down
4th Step:- Now
attach the Track object to our Static routes
Ø
R1(config)#ip
route 0.0.0.0 0.0.0.0 200.200.200.1 track 1
ü
Primary Routes from ISP1
ü
Track
1:- Track object number
Ø
R1(config)#ip
route 0.0.0.0 0.0.0.0 200.200.200.5 10
ü
10
:- Administrative distance
ü
Backup Route from ISP2
Troubleshooting & Verification Commands:-
Ø
R1#show
ip sla statistics
Ø
R1#show
track
Ø
R1#show
ip route
Now Test
Ø
Shutdown
the ISP1 serial interface
Ø
Automatically all the traffic goes to ISP2
After
no shut
Ø
And
all traffic goes to ISP
Very Helpful
ReplyDeleteGreat Article
ReplyDeleteCyber Security Projects
projects for cse
Networking Security Projects
JavaScript Training in Chennai
JavaScript
Training in Chennai
The Angular Training covers a wide range of topics including Components, Angular Directives, Angular Services, Pipes, security fundamentals,
Routing, and Angular programmability. The new Angular TRaining will lay the foundation you need to specialise in Single Page Application developer.
Angular Training