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New Member

TTL Expired in transit

Dear Expert,

I am very new with this, I hope someone can help me out from this problem,

I don't understand why I am unable to connect to my branch (this problem occurs suddently) ..

C:\>ping 192.168.210.1

Pinging 192.168.210.1 with 32 bytes of data:

Reply from 172.16.1.2: TTL expired in transit.

Reply from 172.16.1.2: TTL expired in transit.

Reply from 172.16.1.5: TTL expired in transit.

Reply from 172.16.1.2: TTL expired in transit.

please advise.. thanks

Regards

Winanjaya

  • WAN Routing and Switching
4 REPLIES

Re: TTL Expired in transit

Hi Winanjaya,

As per the results the router 172.16.1.2 does not have a route to the branch and hence it sends a TTL expired in transit back.

Do u see any fluctuations on the link to your branch when you face this problem?

HTH

Narayan

Hall of Fame Super Silver

Re: TTL Expired in transit

Winanjaya

Part of the IP header is a field known as Time To Live (TTL). Every time an IP packet goes through a router (layer 3 interface) the TTL is reduced. If the TTL gets to 0 the router drops the packet and sends an ICMP error indicating TTL expired in transit. So it looks like the router at 172.16.1.2 has your packet with TTL of 0. In my experience this symptom frequently indicates a routing loop. If you do tracert (since you seem to be dong this from a windows PC command prompt) to the same address it will show the path through the network, and I suspect that it will reveal that there is a routing loop (you will see the same pair of addresses multiple times in the tracert results).

HTH

Rick

New Member

Re: TTL Expired in transit

Check your routing table,& check the routing config on both routers, and try to dial(if you can't telnet) into 172.16.1.2. this where the pkt drops and u get timed out. Check the config, log, on this router.

Green

Re: TTL Expired in transit

You have a routing loop, apparently between router .2 and router.5

Check the route settings and make sure you don't have static routes pointing to each other (like each being the "Default Gateway" or "Router of Last Resort" for the other).

If you can post a "show run" from each, and, if possible a "Show ip route" from each, that would help a great deal.

Good Luck

Scott

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