Hello all,
I am currently trying to troubleshoot packet loss I am having from our pexip management source, which uses 1500byte MTU value, to our AWS cloud instance through Direct connect, configured on a subinterface.
This is my current setup:
interface GigabitEthernet0/0/1
description aws direct connect
no ip address
ip mtu 1300
ip tcp adjust-mss 1260
no negotiation auto
!
interface GigabitEthernet0/0/1.102
description aws direct connect vlan
encapsulation dot1Q 102
ip address X.X.X.25 255.255.255.248
ip access-group 111 in
!
interface GigabitEthernet0/0/1.103
description "Direct Connect to VPC"
encapsulation dot1Q 103
ip address X.X.X.2 255.255.255.252
ip mtu 1300
ip tcp adjust-mss 1260
But when I do show commands to verify if the configuration took effect, I do not see the new 1300 MTU value.
I only see the original 1500 MTU value, as seen below:
Router# sho interface gigabitEthernet 0/0/1
GigabitEthernet0/0/1 is up, line protocol is up
Description: aws direct connect
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set
Keepalive not supported
Full Duplex, 1000Mbps, link type is force-up, media type is LX
output flow-control is on, input flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:03, output hang never
Last clearing of "show interface" counters never
AND
Router# sho interface gigabitEthernet 0/0/1.103
GigabitEthernet0/0/1.103 is up, line protocol is up
Description: "Direct Connect to VPC"
Internet address is X.X.X.2/30
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 103.
ARP type: ARPA, ARP Timeout 04:00:00
Keepalive not supported
Last clearing of "show interface" counters never
Is there a reason the new configured value is not reflected on the main interface G0/0/1 nor the subinterface G0/0/1.103?
Thank you for any guidance!
