ICMP replies captured but not considered by ping

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On my server, I configured 3 IP in the same network (172.16.26.10/27) :
bond0 : 172.16.26.10
eth3 : 172.16.26.27
eth5 : 172.16.26.26
The gateway is in this network 172.16.26.6 but

I can ping this gateway from bond0 interface but not from eth3 neither eth5. All packet are seen as lost

[root@admin0 ~]# ping -I eth3 172.16.26.6
PING 172.16.26.6 (172.16.26.6) from 172.16.26.27 eth3: 56(84) bytes of data.
^C
--- 172.16.26.6 ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 6582ms

However, when I capture icmp traffic during the ping I can see that requests and replies.

[root@admin0 ~]# tcpdump -r /tmp/ping_router_from_eth3_2.pcap | grep -i icmp
reading from file /tmp/ping_router_from_eth3_2.pcap, link-type EN10MB (Ethernet)
17:03:19.775411 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 1, length 64
17:03:19.775523 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 1, length 64
17:03:20.775312 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 2, length 64
17:03:20.775429 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 2, length 64
17:03:21.775306 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 3, length 64
17:03:21.775437 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 3, length 64
17:03:22.775147 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 4, length 64
17:03:22.775277 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 4, length 64
17:03:23.774346 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 5, length 64
17:03:23.774477 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 5, length 64
17:03:24.774290 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 6, length 64
17:03:24.774415 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 6, length 64
17:03:25.774316 IP admin0-sig-sec > 172.16.26.6: ICMP echo request, id 48904, seq 7, length 64
17:03:25.774421 IP 172.16.26.6 > admin0-sig-sec: ICMP echo reply, id 48904, seq 7, length 64
tcpdump: pcap_loop: truncated dump file; tried to read 66 captured bytes, only got 21

Why ping command considered packet as lost whereas I can capture the reply ?

LW

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