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ARP Issue

BKSRKL
Occasional Contributor

ARP Issue

Hi 

When I ping to one of the switch in our network I don't get any reply .

all switches and my hosts are in default vlan .

I tried to debug on the destination switch to which I am pinging . I found below details which might be the reson I am not getting any reply from the switch.

*Aug 22 19:53:59:690 2017 PM-DC ARP/7/arp_send: Send an ARP Packet, operation : 1, sender_eth_addr : 3822-d626-c9d7,sender_ip_addr : 10.147.24.80, target_eth_addr : 0000-0000-0000, target_ip_addr : 10.147.24.254

*Aug 22 19:53:59:691 2017 PM-DC ETH/7/eth_info:

 Output L3 ethernet packet!

*Aug 22 19:53:59:691 2017 PM-DC ETH/7/eth_info:

  ETHL3EncapHead need encap l2 head

*Aug 22 19:53:59:692 2017 PM-DC ETH/7/eth_send: Send an eth packet, interface: Vlan-interface1, format: 0, prototype: 0806, src_addr : 3822-d626-c9d7, dst_addr : ffff-ffff-ffff

*Aug 22 19:53:59:692 2017 PM-DC ETH/7/eth_info:

Eth L3 Output packet head is :

  ff ff ff ff ff ff 38 22 d6 26 c9 d7

  08 06 00 01 08 00 06 04 00 01

*Aug 22 19:53:59:693 2017 PM-DC RXTX/7/pkt: 

From board 0: transmit packet from chip0,vlan1,Priority=0x7,len=46

*Aug 22 19:53:59:693 2017 PM-DC RXTX/7/pkt:

 -----------------------------------------------------

 -----------------------------------------------------

 

*Aug 22 19:53:59:694 2017 PM-DC ETH/7/eth_info:

  ETHL3EncapHead resolve Arp error!

*Aug 22 19:53:59:694 2017 PM-DC ETH/7/eth_info:

  ETHL3EtherOutput resolve Arp failed in encapheading!

*Aug 22 19:53:59:695 2017 PM-DC IPTRAP/7/debug_icmp:

SOCK RAW OUTPUT OK:

 

 

But some other devices are able to ping the switch .  what could be the issue 

1 REPLY
Carsick0
Occasional Advisor

Re: ARP Issue

I would look carefully at your IP configuration on you VLAN interface. Make sure the subnet mask, gateway etc is the same on both. Are you using a management port. It will be something easy but you need to find it.