intermittent routing

[lmusgrave]

i have a person trying to connect over a wan to our network in the following way

remote pc ip: 6.21.19.6

remote router ethernet ip: 6.21.19.98

remote router serial : 90.250.69.2

local router serial: 90 250.69.1

local router ethernet ip: 5.21.18.98

internal vlan routing via cisco 2600 series router

router ip's:

vlan 1 managament vlan 10.1.1.1

vlan 5 5.21.18.199

vlan 6 6.21.20.200

he needs to connect to two servers.

5.21.18.101 on vlan 5

and 6.21.20.242 on vlan 6

connecting to 5.21.18.101 is fine

connecting to 6.21.20.242 will work for a while, stop working for a while, then

start working again, in a constantly repeating cycle.

how do i stop this cycle? i've tried resetting routes on all the routers and

putting static routes on the pc's but it still continues. the remote pc is

not on directly on a vlan, would this cause it?

the following are the routes that have been setup.

remote router:

ip route 0.0.0.0 0.0.0.0 5.21.18.98

ip route 5.21.18.0 255.255.255.0 90.250.69.1

ip route 6.21.20.0 255.255.255.0 90.250.69.1

local router

ip route 0.0.0.0 0.0.0.0 5.21.18.199

ip route 0.0.0.0 0.0.0.0 90.250.69.2

ip route 6.21.19.0 255.255.255.0 90.250.69.2

vlan router

ip route 6.21.19.0 255.255.255.0 5.21.18.98

thanks for any help

[srittenberg]

Your routing statement is troubling. Wwithout knowing the details, based on your info. I am having trouble understanding the two default route on your router. Do you have other VLANs? does this router is also your edge router which provide internet service? the router should point to the serial interface only, since this is a WAN connection.

You could also turn the routing protocol on like eigrp, then setup the vlan5 and vlan6 interface to be passive.

[mfaust]

If I understand your physical connections correctly, I would setup your routes as follows: On the remote router "ip route 0.0.0.0 0.0.0.0 90.250.69.1". This will send all unknown traffic to the local router. On the local router "ip route 6.21.19.0 255.255.255.0 90.250.69.2" and "ip route 6.21.20.0 255.255.255.0 5.21.18.199". This will tell the local router the next hop to the 6.21.19.0/24 and 6.21.20.0/24 networks. On the VLAN router "ip route 6.21.19.0 255.255.255.0 5.21.18.98". This will tell the VLAN router the next hop to the remote ethernet. On the server 6.21.20.42 "default gateway 6.21.20.200" and on the server 5.21.18.101 "default gateway 5.21.18.98". This will give each router a default gateway. Good luck!

[klouthan]

If you must have two default routes, give the one that is backup a higher metric.