[c-nsp] MTU size issue on 7600-S

[Rizal]

Hi,

I have 7600-S module as follows:

7600-s#sh module
Mod Ports Card Type                              Model
Serial No.
--- ----- -------------------------------------- ------------------
-----------
  1    2  ESM20G                                 7600-ES20-10G3CXL
  2    2  ESM20G                                 7600-ES20-10G3CXL
  3    0  4-subslot SPA Interface Processor-400  7600-SIP-400
  4   24  CEF720 24 port 1000mb SFP              WS-X6724-SFP
  5    2  Route Switch Processor 720 (Hot)       RSP720-3CXL-GE
  6    2  Route Switch Processor 720 (Active)    RSP720-3CXL-GE
  7   24  CEF720 24 port 1000mb SFP              WS-X6724-SFP
  8   24  CEF720 24 port 1000mb SFP              WS-X6724-SFP
  9    8  CEF720 8 port 10GE with DFC            WS-X6708-10GE

I create EtherSVI interface (interface VLAN) with MTU size of 9126 as
follows:

!
interface Vlan888
 mtu 9216
 ip address 10.1.1.1 255.255.255.252
!
7600-s#sh int vlan 888
Vlan888 is up, line protocol is up
  Hardware is EtherSVI, address is 001d.7081.f300 (bia 001d.7081.f300)
  Internet address is 10.1.1.1/30
  MTU 9216 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:20:54, output 00:20:43, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  L2 Switched: ucast: 20 pkt, 16306 bytes - mcast: 0 pkt, 0 bytes
  L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast
  L3 out Switched: ucast: 0 pkt, 0 bytes mcast: 0 pkt, 0 bytes
     20 packets input, 16306 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     31 packets output, 34045 bytes, 0 underruns
     0 output errors, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out

Then, I put my laptop to one of port at  WS-X6724-SFP module using SFP-
T type and configured as switchport access vlan 888 and set the MTU
size to 9216.

!
interface GigabitEthernet4/24
 switchport
 switchport access vlan 888
 switchport mode access
 mtu 9216
!

The problem is that, why I can only ping to interface vlan 888
(10.1.1.1) with maximum size of 1500 even though I set the interface
vlan MTU to 9216.

Correct me if I'm wrong that EtherSVI logical interface is created in
the Route Switch Processor?

Regards,

/Rizal