[c-nsp] IOS XR forward frame > default MTU interface

Jimmy hngjimmy at gmail.com
Thu Jul 7 23:05:15 EDT 2016


Hi,
Just checking, is it normal for IOS XR to send out frame size bigger than
default MTU interface ?
What I noticed so far:
IOS XR:
#show interfaces Te0/9/0/23 | in MTU
  MTU 1514 bytes, BW 10000000 Kbit (Max: 10000000 Kbit)

#show controllers Te0/9/0/23 stats | in 1519
    Input pkts 1519-Max bytes   = 0
    Output pkts 1519-Max bytes  = 10513145


On the other end, using Juniper detected as error
> show interfaces xe-0/1/0 extensive | match "frame|error"
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps, BPDU
Error: None, Loopback: None,
  Input errors:
    Errors: 1584, Drops: 0, Framing errors: 0, Runts: 0, Policed discards:
0, L3 incompletes: 1584, L2 channel errors: 0,
    L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 37, Errors: 0, Drops: 0, Collisions: 0, Aged
packets: 0, FIFO errors: 0, HS link CRC errors: 0,
    MTU errors: 0, Resource errors: 0
    Bit errors                            19
    Errored blocks                        35
    CRC/Align errors                         0                0
    FIFO errors                              0                0
    MAC control frames                       0                0
    MAC pause frames                         0                0
    Oversized frames                  10511308
    Jabber frames                            0
    Fragment frames                          0
    VLAN tagged frames                       0
    Total errors                      10511308                0
    Output packet error count                                 0


Regards,
Jimmy Hng.


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