static routing issue no access to public internet

Posted on 2016-11-24
Last Modified: 2017-01-14
static routing issue no access to public internet
We have 3 vlan's
vlan 1
vlan 12
vlan 13

interface NULL0

# configuration of 1 router vrrp
interface Vlan-interface12
 ip address
 vrrp vrid 12 virtual-ip
interface Vlan-interface13
 ip address
 vrrp vrid 13 virtual-ip

# gateway to internet
interface GigabitEthernet0/1
 port link-mode route
 ip address

#static route to internet
ip route-static

Routing Tables:
Destination/Mask    Proto  Pre  Cost         NextHop         Interface           Static 60   0     GE0/1         Direct 0    0         InLoop0        Direct 0    0         InLoop0      Direct 0    0     Vlan13      Direct 1    0         InLoop0    Direct 0    0         InLoop0      Direct 0    0     Vlan12      Direct 1    0         InLoop0    Direct 0    0         InLoop0

Ip :
Mask :
Gateway :

Ping to     is ok            gateway
ping to     is ok            gateway
ping to      is ok            computer in network
ping to      is ok            public ip router
ping to      no response      public gateway
ping to            no response      public internet
Question by:manuverhaegen
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LVL 30

Expert Comment

by:Predrag Jovic
ID: 41900771
Did you check your NAT configuration?
If not natted, private IP address space is dropped at ISP.

Author Comment

ID: 41900775

Nat from external to internal work perfect
LVL 30

Accepted Solution

Predrag Jovic earned 500 total points
ID: 41900776
Most likely NAT is problem. Double check it. Internal routing works properly.
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Author Comment

ID: 41900779
i try to ping to external a receive no reply
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41900799
Until you try to ping ISP router it is OK.
My guess is is your router is ISP device
Basically - traffic from ISP router drop your traffic (not natted) or forwarding traffic in wrong direction (ISP's router do not point to your router as next hop to reach netted traffic).
Nat from external to internal work perfect
If you can ping ISP from router directly connected to ISP 99% chance is that NAT is the root cause. From the statement that external NAT works OK most likely that is the case.

Author Closing Comment

ID: 41900802
On the public interface i forget :
nat outbound
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41900804
It happens. ;)

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