seems arp problem with bonding 802.3ad on centos 5

I have One switch ( cisco 3750 ) and four servers with 2 intel e1000 card

I want to do bonding 802.3ad ( mode 4 bonding linux )

everything seems to be properly configured on server and switch
see configuration at the end

I can access with ssh from any external machine to all servers

but connection from one server to another work strangely
seems arp problem beetween server on bond device and not with the gateway on
the cisco

working 10 seconds every 30 seconds

if somebody as an idea

PING dynserv2.ipslnet (172.20.176.92) 56(84) bytes of data.
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=1 ttl=64 time=1.16 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=2 ttl=64 time=0.134 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=3 ttl=64 time=0.092 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=4 ttl=64 time=0.156 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=5 ttl=64 time=0.092 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=6 ttl=64 time=0.156 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=7 ttl=64 time=0.094 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=8 ttl=64 time=0.157 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=9 ttl=64 time=0.095 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=35 ttl=64 time=990 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=36 ttl=64 time=0.136 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=37 ttl=64 time=0.078 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=38 ttl=64 time=0.141 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=39 ttl=64 time=0.078 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=40 ttl=64 time=0.141 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=41 ttl=64 time=0.078 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=42 ttl=64 time=0.140 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=43 ttl=64 time=0.202 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=68 ttl=64 time=1990 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=69 ttl=64 time=990 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=70 ttl=64 time=0.122 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=71 ttl=64 time=0.064 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=72 ttl=64 time=0.126 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=73 ttl=64 time=0.065 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=74 ttl=64 time=0.127 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=75 ttl=64 time=0.066 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=76 ttl=64 time=0.129 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=77 ttl=64 time=0.191 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=102 ttl=64 time=1990 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=103 ttl=64 time=990 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=104 ttl=64 time=0.109 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=105 ttl=64 time=0.174 ms
64 bytes from dynserv2.ipslnet (172.20.176.92): icmp_seq=106 ttl=64 time=0.111 ms

--------------------------------
config
--------------------------------

etherchannel is configured on switch
Version 12.2(25)SEB2

interface Port-channel1
description dynserv0 bonding
switchport access vlan 353
!
interface Port-channel2
description dynserv1 bonding
switchport access vlan 353
!
interface Port-channel3
description dynserv2 bonding
switchport access vlan 353
!
interface Port-channel4
description dynserv3 bonding
switchport access vlan 353
!
interface GigabitEthernet1/0/1
description dynserv0 bond
switchport access vlan 353
channel-group 1 mode active
!
interface GigabitEthernet1/0/2
description dynserv0 bond
switchport access vlan 353
channel-group 1 mode active
!
interface GigabitEthernet1/0/3
description dynserv1 bond
switchport access vlan 353
channel-group 2 mode active
!
interface GigabitEthernet1/0/4
description dynserv1 bond
switchport access vlan 353
channel-group 2 mode active
!
interface GigabitEthernet1/0/5
description dynserv2 bond
switchport access vlan 353
channel-group 3 mode active
!
interface GigabitEthernet1/0/6
description dynserv2 bond
switchport access vlan 353
channel-group 3 mode active
!
interface GigabitEthernet1/0/7
description dynserv3 bond
switchport access vlan 353
channel-group 4 mode active
!
interface GigabitEthernet1/0/8
description dynserv3 bond
switchport access vlan 353
channel-group 4 mode active

for all linux server only ip addesse is changed

[root@dynserv3 ~]# grep bond /etc/modprobe.conf
options bonding mode=4 miimon=100
alias bond0 bonding

[root@dynserv3 ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
MASTER=bond0
BOOTPROTO=none
SLAVE=yes
ONBOOT=yes

[root@dynserv3 ~]# more /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
MASTER=bond0
BOOTPROTO=none
SLAVE=yes
ONBOOT=yes

[root@dynserv3 ~]# more /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Bonding
BOOTPROTO=none
IPADDR=172.20.176.93
NETMASK=255.255.255.0
BROADCAST=172.20.176.255
GATEWAY=172.20.176.254
ONBOOT=yes