Question:
I'm currently
looking over Catalyst Switches different models of ISR G2s for my company, and am thinking
between the 3925 and 2911... We plan on having 2 WAN connections hooked up to
the router, and use the 3rd port for the LAN. One ISP is a cable connection,
and the other a fiber optic... Both have ethernet drop offs at the demarc, so I
plan on using the GigabitEthernet ports.
Is it possible
to setup WAN Redundancy without any protocols like BGP? What would the config
look like, I couldn't find any articles on the subject, just for BGP.
Main WAN
Link--------------------
(ROUTER) -------------------LAN
Backup WAN
Link----------------
Crude drawing
for what I'm trying to achieve. There won't be any hosted services or any
Static NAT going on either.
Answer:
You should use
floating static route.
Configure
static default route with high admin distance via backup link:
ip route 0.0.0 .0
0.0.0.0 backup_interface 250 name floating_static_route
Than configure
IP SLA with tracking if primary link is UP. If primary link is working, default
route will be instaled into routing table and this link will be used. If
primary link fail, default route will be removed from routing table and default
route with admin distance 250 will be used via backup link.
ip sla 1
icmp-echo
IP_address
ip sla schedule
1 start-time now life forever
track 1 ip sla
1 state
ip route 0.0.0 .0
0.0.0.0 primary_interface Cisco 3560 Price track 1
没有评论:
发表评论