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GRE between Cisco 827 and Juniper ERX

I am currently looking for a working config for a GRE tunnel between a Cisco 827 and a Juniper ERX. The Cisco connects to the 827 via PPPoE. The transport into the DSL cloud is through a L2TP tunnel. Here is what I have so far:

Cisco 827:

interface Tunnel0 ip address 2.2.2.2 255.255.255.252 tunnel source Dialer1 tunnel destination 172.31.80.1 ! interface Ethernet0 ip address 192.168.150.1 255.255.255.0 hold-queue 100 out ! interface ATM0 no ip address no atm ilmi-keepalive dsl operating-mode auto ! interface ATM0.1 point-to-point pvc 8/35 encapsulation aal5snap pppoe-client dial-pool-number 1 ! ! interface Dialer1 mtu 1492 ip address negotiated encapsulation ppp dialer pool 1 ppp pap sent-username *********@*******.*** password 0 ********* ! ip classless ip route 0.0.0.0 0.0.0.0 Dialer1

ERX:

interface loopback 5 ip address 172.31.80.1 255.255.255.0 ! interface tunnel gre:lab transport-virtual-router Lab tunnel source 172.31.80.1 tunnel destination 172.31.80.2 ip address 2.2.2.1 255.255.255.252

Any assistance is appreciated

Reply to
skweetis
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In Cisco GRE tunnel configuration example, the tunnel source was confiugred as the Ethernet interface not the dialer interface. Not sure if this matters

see ttp://

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Reply to
Merv

ttp://

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That's a nice page, thanks.

Without hours of study, it looks as if that example uses Ethernet 1 as the external interface and the Original Poster has a dialer on the outside so it is OK.

I have a working GRE tunnel setup but I happened to use the IP address for the source. Now that it has been pointed out I may change that.

interface Tunnel1 ip address a.a.a.a 255.255.255.252 ip mtu 1400 ip tcp adjust-mss 1360 load-interval 30 tunnel source x.x.x.x tunnel destination x.x.x.y

There is a Dialer with a negotiated address x.x.x.x

The cisco end of your config looks OK to me assuming that the negotiated address is

172.31.80.2.

If you run a dynamic routing protocol you should have

ip route 172.31.80.1 dialer 1

to make sure that you do not get recursive routing.

Reply to
anybody43

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