MPLS VPNs - Latency

[Mikey John]

Hello All,

I have a MPLS VPN setup for one of my sites. We have a 10M pipe (Ethernet handoff) from the MPLS SP, and it is divided into 3 VRFs.

6M - Corp traffic

2M - VRF1

2M - VRF2

The users are facing lot of slowness while trying to access application on VRF1. I can see the utilization on the VRF1 is almost 60% of it's total capacity (2M). Yesterday when trying to ping across to the VRF1 Peer in the MPLS cloud, I was getting a Max response time of 930ms.

xxxxx#sh int FastEthernet0/3/0.1221

FastEthernet0/3/0.1221 is up, line protocol is up

  Hardware is FastEthernet, address is 503d.e531.f9ed (bia 503d.e531.f9ed)

  Description: xxxxx

  Internet address is x.x.x.x/30

  MTU 1500 bytes, BW 2000 Kbit, DLY 1000 usec,

     reliability 255/255, txload 71/255, rxload 151/255

  Encapsulation 802.1Q Virtual LAN, Vlan ID  1221.

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

  Last clearing of "show interface" counters never

I also see a lot of Output drops on the physical interface Fa0/3/0. Before going to the service provider, can you please tell me if this can be an issue with the way QoS is configured on these VRFs?

xxxxxxx#sh int FastEthernet0/3/0 | inc drops

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 3665

Appreciate your help.

Thanks

Mikey

[Kishore Chennupati]

hi mikey,

sorry for the late reply. the short answer is it could be both. perhaps the link could be bad. When the 10M pipe is full you will exprience congestion and hence latency. what i mean is there is no Qos or prioritisation in place right? so all the traffic wil be FIFO(first in first out)  which is default on ethernet media. so if your interface queue is already full then you will see that delay.

Have i answered your question?  Please feel free to ask more if im not clear

Kishore