Cant ping

Unanswered Question
Dec 2nd, 2007

Hi, from the attached diagram, why i cannot ping from router A to router C? and vice versa. Router B and C can ping to each other connected and configured for frame_relay using serial cables back-to-back. Router E is configured as frame_switch. What other alternative connections can I used since i need to connect 3 routers as hub and spoke to router E? Any suggestions? I want to simulate frame relay connection. thanks

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Overall Rating: 4.8 (4 ratings)
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ccbootcamp Sun, 12/02/2007 - 23:49

Post your configs from your routers.

What type of routing are you doing? Statics? routing protocol? need mroe information here.

-brad

www.ccbootcamp.com

(please rate the post!)

korbenda11as Mon, 12/03/2007 - 19:22

For the frame_relay switch:

Frame-relay switching

interface s0/0

encapsulation frame-relay

clockrate 64000

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 210 interface serial0/1 200

!

interface s0/1

encapsulation frame-relay

clockrate 64000

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 200 interface serial0/0 210

Router B

interface serial0/0

ip address 192.1.1.1 255.255.255.0

encapsulation frame-relay

frame-relay lm1-type ansi

Router C

interface serial0/0

ip address 192.1.1.2 255.255.255.0

encapsulation frame-relay

frame-relay lm1-type ansi

For router A and B i just group it into VLAN and configured just the ip address to the interface. there's no static routes been configured yet. no dynamic protocol configured. what should be the next thing to do? From router A to B i can ping but not to C and D. Router B and C can ping to each other? could you help me how to configure the static route. thanks

s.arunkumar Mon, 12/03/2007 - 20:07

hi,

1.why cant ping from A to C??

>>>> Obviously as no routing configured.

2.Can ping from B to C

>>>> Yes,the interface are in same network(NBMA) of frame relay.

3.How to achive the connectivity??

If ur number of networks are less u can go for static routing.Configure default routes on A and D towards the next hop(ie B and C).

Configure specific static routes on B and C for reaching other networks..

U mentioned abt hub n spoke on above post.Is that u want to make C as hub??

korbenda11as Mon, 12/03/2007 - 21:31

thanks, yes i want actually to connect the third router to my frame-switch router, however, I am short of smart serial cables, that's why i just connect the third router to frame-switch via back-to-back gig port, will this work? are there any other options? thanks.

korbenda11as Tue, 12/04/2007 - 20:58

can i really route from router A to frame relay cloud? My friends saying that this cannot be done, since frame relay is L2 and im routing L3?

ccbootcamp Tue, 12/04/2007 - 21:10

Your going to run it on your L3 interfaces/network. EIGRP will DEFINITELY work across a FR cloud. If not, then I have about 200+ customers to go to and re-do their network! :)

Who's this friend of yours? Does he work for Juniper? LOL...sorry, couldn't resist.

-brad

www.ccbootcamp.com

(please rate the post if I helped ya!)

korbenda11as Tue, 12/04/2007 - 22:46

Hi brad, thanks for answering my questions. Actually i put default route in router A of ip route 0.0.0.0 0.0.0.0 next hop is router B's gig interface but how come i cannot still ping router C or router on other network? in router B i configure a static route to router D's network with my next hop is router B's serial which is connected to frame switch, but still cannot ping router C or D from router A?

ccbootcamp Tue, 12/04/2007 - 22:50

Does router C have a route back to router A?

You need to have routes going to and from the devices you are trying to reach.

Think it out.

-brad

www.ccbootcamp.com

(please rate the post if this helps!)

korbenda11as Tue, 12/04/2007 - 22:49

Hi arunkumar, i configured router A for a default route of 0.0.0.0 0.0.0.0 with router B' gig int as my next hop, how come i still cannot ping router C? on router B i also configured it with static route with router B's serial as my next hop. but still canot ping from router A to C?

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