DPDK: MTU settting in vhost is not getting set on vif0

[Vinod Nair]

On setting MTU on vhost0 , the same is not getting set on the vif0. This causes TCP session to hang

ifconfig vhost0
vhost0 Link encap:Ethernet HWaddr 90:e2:ba:50:ae:d8
          inet addr:13.1.0.2 Bcast:13.1.0.255 Mask:255.255.255.0
          inet6 addr: fe80::92e2:baff:fe50:aed8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
          RX packets:218118 errors:0 dropped:0 overruns:0 frame:0
          TX packets:417271 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:24342978 (24.3 MB) TX bytes:552493900 (552.4 MB)

root@cs-scale-2:~# vif --list
Vrouter Interface Table

Flags: P=Policy, X=Cross Connect, S=Service Chain, Mr=Receive Mirror
       Mt=Transmit Mirror, Tc=Transmit Checksum Offload, L3=Layer 3, L2=Layer 2
       D=DHCP, Vp=Vhost Physical, Pr=Promiscuous, Vnt=Native Vlan Tagged
       Mnp=No MAC Proxy, Dpdk=DPDK PMD Interface, Rfl=Receive Filtering Offload, Mon=Interface is Monitored
       Uuf=Unknown Unicast Flood, Vof=VLAN insert/strip offload

vif0/0 PCI: 0000:00:00.0 (Speed 10000, Duplex 1)
            Type:Physical HWaddr:90:e2:ba:50:ae:d8 IPaddr:0
            Vrf:0 Flags:TcL3L2VpVof MTU:1514 Ref:14
            RX port packets:229788 errors:0
            RX queue packets:218850 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:220614 bytes:24758265 errors:0
            TX packets:419840 bytes:552927674 errors:0
            TX port packets:419857 errors:0

vif0/1 Virtual: vhost0
            Type:Host HWaddr:90:e2:ba:50:ae:d8 IPaddr:0
            Vrf:0 Flags:L3L2 MTU:1514 Ref:10
            RX port packets:417295 errors:0
            RX queue packets:417293 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:417295 bytes:552513340 errors:0
            TX packets:218134 bytes:24344477 errors:0
            TX queue packets:216370 errors:0
            TX port packets:218134 errors:0

vif0/2 Socket: unix
            Type:Agent HWaddr:00:00:5e:00:01:00 IPaddr:0
            Vrf:65535 Flags:L3 MTU:1514 Ref:2
            RX port packets:105 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:105 bytes:9030 errors:0
            TX packets:107 bytes:11888 errors:0
            TX queue packets:107 errors:0
            TX port packets:107 errors:0 syscalls:107

[Vinod Nair (vinodnair)]

misconfig on switch