10 Gig interfaces limited to 1 gig vlan.

[Kerry Kriegel]

Hello,

I have the following setup in my data center for connectivity from multiple cores to multiple edges (each edge connects to multiple providers).

Edge-1  Ten 2/1 <-----------> Core-1  Ten 9/1 (VLAN 961)

Edge-2  Ten 2/1 <-----------> Core-1  Ten 9/2  (VLAN 961)

Edge-1  Ten 2/2 <-----------> Core-2  Ten 9/1 (VLAN 958)

Edge-2  Ten 2/2 <-----------> Core-2  Ten 9/2  (VLAN 958)

Edge-1  Ten 2/3 <-----------> Core-3  Ten 2/1 (VLAN 959)

Edge-2  Ten 2/3 <-----------> Core-3  Ten 2/2  (VLAN 959)

Edge-1  Ten 2/4 <-----------> Core-4  Ten 2/1 (VLAN 960)

Edge-2  Ten 2/4 <-----------> Core-4  Ten 2/2  (VLAN 960)

These are 6500’s and their 10-G connections to each of the 2 edge 6500’s is a direct fiber connection.
Please note that the interfaces are not trunking, and the edges do not have any spanning-tree instances running.
The edges run BGP with the providers and the cores are running EIGRP within the datacenter.

This is a snippet of the "show interface" for all of the VLAN 958 connections ..

Edge-1

#sh int te 2/2

TenGigabitEthernet2/2 is up, line protocol is up (connected)

  Hardware is C6k 10000Mb 802.3, address is d0d0.fd0e.fc40 (bia d0d0.fd0e.fc40)

  Description: Connected to DC2-Core-A TenGigabit 9/1 via FO1-B-2.

  Internet address is 66.185.29.194/28

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 12/255, rxload 13/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 10Gb/s, media type is 10Gbase-SR

Edge-2

#sh int te 2/2

TenGigabitEthernet2/2 is up, line protocol is up (connected)

  Hardware is C6k 10000Mb 802.3, address is 0011.5d96.cc00 (bia 0011.5d96.cc00)

  Description: Connected to DC2-Core-A TenGigabit 9/2.

  Internet address is 66.185.29.195/28

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 3/255, rxload 10/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 10Gb/s, media type is 10Gbase-SR

 Core-1

#sh int te 9/1

TenGigabitEthernet9/1 is up, line protocol is up (connected)

  Hardware is C6k 10000Mb 802.3, address is 001a.a10e.d844 (bia 001a.a10e.d844)

  Description: Connected to DC1-Edge-A TenGigabit 2/2 via FO1-B-2.

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 13/255, rxload 12/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 10Gb/s, media type is 10Gbase-SR

#sh int te 9/2

TenGigabitEthernet9/2 is up, line protocol is up (connected)

  Hardware is C6k 10000Mb 802.3, address is 001a.a10e.d845 (bia 001a.a10e.d845)

  Description: Connected to DC2-Edge-A TenGigabit 2/2.

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 11/255, rxload 3/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 10Gb/s, media type is 10Gbase-SR

#sh int vlan 958

Vlan958 is up, line protocol is up

  Hardware is EtherSVI, address is 00d0.02da.3400 (bia 00d0.02da.3400)

  Description: Connected to the EIGRP Edge-cloud.

  Internet address is 66.185.29.193/28

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 249/255, rxload 148/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  ARP type: ARPA, ARP Timeout 04:00:00

 ..

..

All of the VLAN's are showing the same bandwidth of 1 gig.  Why is the vlan interface speed is only 1 gig?

Each of the VLAN's is configured with a /28 so I can make each individual interface a layer 3 if necessary.

I can upload a more detailed pdf drawing if it is needed.

[Joseph W. Doherty · Accepted solution]

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Posting

My guess, it probably is a default, because what should a SVI interface's bandwidth be?  I mean, would you want it to be a constantly changing aggregate of all the interfaces that are "up" in the VLAN?  Or, how should a trunk interface be counted, as it's shared with other VLANs?

Assuming the SVI accepts a bandwidth statement, configure it to what is useful/correct for you.