Hello Team,
This is my first time that i use IOS XR and the Cisco 1100 series and i have a problem with the MTU size on specific Interfaces. To be more clear i have changed the MTU size (9216) on the two Uplink ports GigabitEthernet0/0/0 & GigabitEthernet0/0/1 but even though i have changed the mtu size on the VLAN interface the port that is assigned on the vlan 10 (GigabitEthernet0/1/0) still uses mtu 1500.
I tried to change the mtu size on the Int Giga 0/1/0 but mtu size command is not allowed. The client (XXX.XXX.0.2) tries to ping Gateway (XXX.XXX.0.1) with size 1700 df and all the packets are dropped as you can see on the output.
My question is if the rest interfaces Gi0/1/0 -7 ) support mtu size bigger than 1500
Bellow is my CPE output "
sh ver :
cisco C1111-8P (1RU) processor with 1453284K/6147K bytes of memory.
Processor board ID FCZ2XXXXXX
2 Virtual Ethernet interfaces
10 Gigabit Ethernet interfaces
32768K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
2863103K bytes of flash memory at bootflash:.
0K bytes of WebUI ODM Files at webui:.
System image file is "bootflash:c1100-universalk9_ias.16.09.02.SPA.bin"
show license :
Load for five secs: 1%/0%; one minute: 1%; five minutes: 1%
Time source is NTP, 18:24:35.052 EET Fri Jul 29 2022
Index 1 Feature: appxk9
Period left: Not Activated
Period Used: 0 minute 0 second
License Type: EvalRightToUse
License State: Active, Not in Use, EULA not accepted
License Count: Non-Counted
License Priority: None
Index 2 Feature: securityk9
Period left: Not Activated
Period Used: 0 minute 0 second
License Type: EvalRightToUse
License State: Active, Not in Use, EULA not accepted
License Count: Non-Counted
License Priority: None
Index 3 Feature: ipbasek9
Period left: Life time
License Type: Permanent
License State: Active, In Use
License Count: Non-Counted
License Priority: Medium
Index 4 Feature: FoundationSuiteK9
Period left: Not Activated
Period Used: 0 minute 0 second
License Type: EvalRightToUse
License State: Active, Not in Use, EULA not accepted
License Count: Non-Counted
License Priority: None
Index 5 Feature: hseck9
Index 6 Feature: throughput
Period left: Not Activated
Period Used: 0 minute 0 second
License Type: EvalRightToUse
License State: Active, Not in Use, EULA not accepted
License Count: Non-Counted
License Priority: None
Index 7 Feature: internal_service
sh int description
Load for five secs: 1%/0%; one minute: 1%; five minutes: 1%
Time source is NTP, 18:40:03.591 EET Fri Jul 29 2022
Interface Status Protocol Description
Gi0/0/0 up up
Gi0/0/1 up up
Gi0/1/0 up up
Gi0/1/1 down down
Gi0/1/2 down down
Gi0/1/3 down down
Gi0/1/4 down down
Gi0/1/5 down down
Gi0/1/6 down down
Gi0/1/7 down down
Lo0 up up
Vl1 up down
Vl10 up up *** LAN ***
GigabitEthernet0/0/0 is up, line protocol is up <-- 1st Uplink port
Hardware is C1111-2x1GE, address is d478.9b21.a100 (bia d478.9b21.a100)
Internet address is XXX.XXXX.XXXX.XXX/30
MTU 9216 bytes, BW 153600 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 54/255, rxload 60/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Full Duplex, 1000Mbps, link type is auto, media type is RJ45
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 104585
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
30 second input rate 36561000 bits/sec, 6455 packets/sec
30 second output rate 32712000 bits/sec, 5461 packets/sec
12264627747 packets input, 11430872526192 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
0 watchdog, 109624 multicast, 0 pause input
8504233759 packets output, 3336748285183 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
109623 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/1/0 is up, line protocol is up (connected) (VLAN 10)
Hardware is C1111-ES-8, address is d478.9b21.a108 (bia d478.9b21.a108)
MTU 1500 bytes, BW 153600 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 60/255, rxload 5/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:08, output 00:00:07, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3530000 bits/sec, 2994 packets/sec
30 second output rate 36420000 bits/sec, 5174 packets/sec
12797852345 packets input, 3337494951781 bytes, 0 no buffer
Received 2 broadcasts (117815 multicasts)
0 runts, 9395 giants, 0 throttles
9395 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 117815 multicast, 0 pause input
0 input packets with dribble condition detected
20855769875 packets output, 11488968091791 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
84611 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
1 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
sh interfaces vlan 10
Load for five secs: 2%/0%; one minute: 1%; five minutes: 1%
Time source is NTP, 18:30:43.674 EET Fri Jul 29 2022
Vlan10 is up, line protocol is up , Autostate Enabled
Hardware is Ethernet SVI, address is d478.9b21.a174 (bia d478.9b21.a174)
Description: *** LAN ***
Internet address is XXX.XXXX.0.1/30
MTU 9216 bytes, BW 153600 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 59/255, rxload 6/255
Encapsulation ARPA, loopback not set
Keepalive not supported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3634000 bits/sec, 3002 packets/sec
30 second output rate 35677000 bits/sec, 5111 packets/sec
8503150060 packets input, 3303487367421 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
12266454234 packets output, 11488004394349 bytes, 0 underruns
0 output errors, 1 interface resets
3651 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
