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Community Member

question on IP statistics

I would like to ask.. what does the ff indicate or mean :

1. bad hop count

2. not a gateway count

3. encapsulation failed count

4. no route count

<--excerp-->

RouterA#sh ip tra

IP statistics:

Rcvd: 6947190 total, 151408 local destination

0 format errors, 0 checksum errors, 804 bad hop count

0 unknown protocol, 7164 not a gateway

0 security failures, 0 bad options, 0 with options

Opts: 0 end, 0 nop, 0 basic security, 0 loose source route

0 timestamp, 0 extended security, 0 record route

0 stream ID, 0 strict source route, 0 alert, 0 other

Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble

0 fragmented, 0 couldn't fragment

Bcast: 138633 received, 5238 sent

Mcast: 0 received, 0 sent

Sent: 212105 generated, 193330 forwarded

14124 encapsulation failed, 6580364 no route

If the values mentioned above keeps incrementing.. what does that mean or indicate? do i have a problem (where)?

pls. i really need help...

thanks

4 REPLIES
Silver

Re: question on IP statistics

1. bad hop count: Occurs when a packet is discarded because its time-to-live (TTL) field was decremented to zero.

2. not a gateway count: ???

3. encapsulation failed count: Usually indicates that the router had no ARP request entry and therefore did not send a datagram.

4. no route count: Counted when the Cisco IOS software discards a datagram it did not know how to route.

I woudn't worry very much about bad hop and encapsulation failed. About no route count I'm not sure but I think maybe some machine(s) in your network is trying to access a network your router don't know. So you can check your routing configuration or try to block undesired traffic before reaching your router

HTH

Community Member

Re: question on IP statistics

Hi! thanks.. reaaly appreciate it! =)

um could i ask something.. coz the values above are fast increasing.. how could i minimize them.. and along side.. on my eth.. my deffered counts also increases.. but my excessive and late collisions somehow stay zero.. i want to know the problem because.. what happens to my network is.. some PCs get randomly disconnected from our DB server from the other side of the network..

here's my config and ip route..

Current configuration:

!

version 11.1

service config

service udp-small-servers

service tcp-small-servers

!

hostname RouterA

!

enable secret

enable password

!

ip subnet-zero

no ip domain-lookup

!

interface Ethernet0

ip address 10.0.1.1 255.255.255.19

no ip route-cache

!

interface Serial0

description Leased Line to Gualo Rai

ip address 10.0.0.1 255.255.255.252

!

no ip classless

ip route 10.0.2.0 255.255.255.240 10.0.0.2

!

line con 0

exec-timeout 0 0

line vty 0 4

password

login

!

end

--

10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks

S 10.0.2.0/28 [1/0] via 10.0.0.2

C 10.0.0.0/30 is directly connected, Serial0

C 10.0.1.0/26 is directly connected, Ethernet0

pls help... thanks in advance

Community Member

Re: question on IP statistics

I assume the subnet mask on your ethernet is 255.255.255.192, and not .19 as shown.

Make sure all of your hosts on this network are configured with the correct subnet mask i.e. some don't have 255.255.255.0 by mistake. By my calculation, the hosts on this network should range between 10.0.1.1 up to .62 (.63 is the broadcast).

Simarly, all hosts on your 10.0.2.0/28 network should be configured with the 255.255.255.240 SNM. Hosts on this network should be in the range 10.0.2.1 up to 10.0.2.14 (.15 is the broadcast).

(If someone checks my calculations here, I'd be grateful).

Incorrect ip settings, especially subnet mask, can cause unpredictable results.

Regards,

Community Member

Re: question on IP statistics

THANKS!

thanks jolmo, for the explanation of the terms.. really a great help!

thanks CKBudrodeen, for the reminder..

yep.. it's 255.255.255.192.. it's a typo transfer error.. the copy and paste thing =)

all your calculations are right.. 62 Hosts and 14 Hosts (excluding the network and broadcast ip) but only 6 hosts per side are crossing to each other side.. i solved my own prob (reducing the increments) by configuring only the 6 hosts with gateway IPs and hard-coded their IPs and MAC Adds to the router. I don't have a manageable switch so for now that's fine. I just experimented and it seemed ok now.. i dont know.. but it seems =)

thanks!

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