[c-nsp] Am I being very stupid or....

[Chris Knipe]

Hi Jan,

You learn something new every day :-)  Thanks.  I guess I was being an
idiot after all...

On Fri, Jul 5, 2013 at 6:07 PM, Jan Gregor <jan.gregor at chronix.org> wrote:
> Hi,
>
> the "ip verify unicast reverse-path" blocks local ping. If you want to
> allow it, you can user the "allow-self-ping" option to the command.
>
> Best regards,
>
> Jan
>
> On 07/05/2013 05:53 PM, Chris Knipe wrote:
>> Hi All,
>>
>> I can't believe I am doing this, but I am either missing something VERY
>> obvious, or I am in need for some assistance on this one...
>>
>> I have a VLAN configured on a Port-Channel (all other VLAN's on the same
>> Port-Channel is working absolutely fine).
>>
>> #sh run int po1.105
>> Building configuration...
>>
>> Current configuration : 429 bytes
>> !
>> interface Port-channel1.105
>> encapsulation dot1Q 105
>>  ip address 198.18.0.1 255.255.255.240
>>  no ip redirects
>>  no ip unreachables
>>  no ip proxy-arp
>>  ip nbar protocol-discovery
>>  ip virtual-reassembly in
>>  ip verify unicast reverse-path
>>  keepalive 30
>> end
>>
>> The interface is up/up
>> #sh int po1.105
>> Port-channel1.105 is up, line protocol is up
>>   Hardware is GEChannel, address is 0021.d816.0380 (bia 0021.d816.0380)
>>   Description: WBTG-HS01 LAN
>>   Internet address is 198.18.0.1/28
>>   MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
>>      reliability 255/255, txload 1/255, rxload 1/255
>>   Encapsulation 802.1Q Virtual LAN, Vlan ID  105.
>>   ARP type: ARPA, ARP Timeout 04:00:00
>>   Keepalive set (30 sec)
>>   Last clearing of "show interface" counters never
>>
>> Yet, from the console on the router ON WHICH the Interface is configured
>> (yes, local router - this is not even a remote ping over a wire):
>> #ping 198.18.0.1
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 198.18.0.1, timeout is 2 seconds:
>> .....
>> Success rate is 0 percent (0/5)
>>
>> Can someone perhaps shed some light for me as to why this would be
>> occurring?  We're looking at a C3825 running IOS 12.5
>>
>> Thanks for your time - hopefully this is me being an 1d10t
>>
>> --
>> Chris.
>>
>>
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>



-- 

Regards,
Chris Knipe