Topology:
RB433-mesh1(00:0c:42:43:43:47)-ether1---(access vlan100)(Cisco c3750)(trunk)---ether1-vlan100-mesh1(02:e3:9e:c4:37:f1)-x86
Configuration on x86:
[admin@MikroTik] > interface ethernet print detail
Flags: X - disabled, R - running, S - slave
0 R name="ether1" mtu=1500 mac-address=00:01:80:04:D0:F7 arp=enabled disable-running-check=yes auto-negotiation=yes full-duplex=yes
cable-settings=default speed=100Mbps
[admin@MikroTik] > interface vlan print detail
Flags: X - disabled, R - running, S - slave
0 R name="bone" mtu=1500 mac-address=00:01:80:04:D0:F7 arp=enabled vlan-id=7 interface=ether1 use-service-tag=no
1 R name="vlan100" mtu=1998 mac-address=00:01:80:04:D0:F7 arp=enabled vlan-id=100 interface=ether1 use-service-tag=no
[admin@MikroTik] > interface mesh print detail
Flags: X - disabled, R - running
0 R name="mesh1" mtu=1500 arp=enabled mac-address=02:E3:9E:C4:37:F1 auto-mac=yes admin-mac=00:00:00:00:00:00 mesh-portal=yes hwmp-default-hoplimit=32
hwmp-preq-waiting-time=4s hwmp-preq-retries=2 hwmp-preq-destination-only=no hwmp-preq-reply-and-forward=yes hwmp-prep-lifetime=5m
hwmp-rann-interval=10s hwmp-rann-propagation-delay=0.5 hwmp-rann-lifetime=22s reoptimize-paths=yes
[admin@MikroTik] > interface mesh fdb print
Flags: A - active, R - root
MESH TYPE MAC-ADDRESS ON-INTERFACE LIFETIME AGE
A mesh1 local 00:01:80:04:D0:F7 31m29s
A mesh1 neighbor 00:0C:42:43:43:47 vlan100 15m25s
A mesh1 local 02:E3:9E:C4:37:F1 52m14s
Configuration on RB433:
[admin@MAP002] > interface mesh print detail
Flags: X - disabled, R - running
0 R name="mesh1" mtu=1500 arp=enabled mac-address=00:0C:42:43:43:47 auto-mac=no admin-mac=00:0C:42:43:43:47 mesh-portal=no hwmp-default-hoplimit=32
hwmp-preq-waiting-time=4s hwmp-preq-retries=2 hwmp-preq-destination-only=no hwmp-preq-reply-and-forward=yes hwmp-prep-lifetime=5m
hwmp-rann-interval=10s hwmp-rann-propagation-delay=0.5 hwmp-rann-lifetime=22s reoptimize-paths=yes
Ping RB433 from outside network via x86:
# ping -s 1466 172.23.16.4
PING 172.23.16.4 (172.23.16.4): 1466 data bytes
1474 bytes from 172.23.16.4: icmp_seq=0 ttl=62 time=3.603 ms
1474 bytes from 172.23.16.4: icmp_seq=1 ttl=62 time=3.178 ms
1474 bytes from 172.23.16.4: icmp_seq=2 ttl=62 time=3.280 ms
^C
--- 172.23.16.4 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 3.178/3.354/3.603/0.181 ms
# ping -s 1472 172.23.16.4
PING 172.23.16.4 (172.23.16.4): 1472 data bytes
^C
--- 172.23.16.4 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss
Catalyst 3750
c3750#sh system mtu
System MTU size is 1998 bytes
System Jumbo MTU size is 1998 bytes
Routing MTU size is 1500 bytes
Trunk port mirror tcpdump:
02:e3:9e:c4:37:f1 > 00:0c:42:43:43:47, ethertype Unknown (0x9aaa), length 1520
00:0c:42:43:43:47 > 02:e3:9e:c4:37:f1, ethertype Unknown (0x9aaa), length 1520
Icmp echo packets normally leave x86, but icmp reply does not pass, with counters on ether1 (x86) increases.
How to solve the problem?