12-07-2010 01:51 PM - edited 03-06-2019 02:24 PM
Isn't a layer 3 switch supposed to correctly count routerd packets in the corresponding VLAN interface ? None of these do count correctly on this 3750 below.
I did not considered that an issue when the system was insatalled, but now thinking about it, it would be nice to know how much traffic each VLAN exchanges with others.
FG-SW-CORE#sh int summ
*: interface is up
IHQ: pkts in input hold queue IQD: pkts dropped from input queue
OHQ: pkts in output hold queue OQD: pkts dropped from output queue
RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
TRTL: throttle count
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-------------------------------------------------------------------------
Vlan1 0 0 0 0 0 0 0 0 0
* Vlan2 0 0 0 0 6000 2 0 0 0
* Vlan3 0 0 0 0 0 0 0 0 0
* Vlan4 0 0 0 0 0 0 0 0 0
* Vlan5 0 0 0 0 0 0 0 0 0
* Vlan6 0 0 0 0 0 0 0 0 0
* Vlan9 0 0 0 0 1000 1 0 0 0
* Vlan14 0 0 0 0 0 0 0 0 0
* Vlan15 0 0 0 0 0 0 0 0 0
* Vlan17 0 0 0 0 0 0 0 0 0
* Vlan19 0 0 0 0 0 0 0 0 0
* Vlan23 0 0 0 0 0 0 0 0 0
* Vlan50 0 0 0 0 0 1 0 0 0
* Vlan99 0 0 0 0 6000 7 0 0 0
* Vlan100 0 0 0 0 2000 5 5000 6 0
* Vlan101 0 0 0 0 0 0 0 0 0
GigabitEthernet1/0/1 0 0 0 0 0 0 0 0 0
* GigabitEthernet1/0/2 0 0 0 0 2000 3 133000 27 0
GigabitEthernet1/0/3 0 0 0 0 0 0 0 0 0
GigabitEthernet1/0/4 0 0 0 0 0 0 0 0 0
* GigabitEthernet1/0/5 0 0 0 0 15559000 3816 20698000 4066 0
* GigabitEthernet1/0/6 0 0 0 0 1197000 227 1193000 256 0
GigabitEthernet1/0/7 0 0 0 0 0 0 0 0 0
* GigabitEthernet1/0/8 0 0 0 0 3000 2 15000 22 0
GigabitEthernet1/0/9 0 0 0 0 0 0 0 0 0
GigabitEthernet1/0/10 0 0 0 0 0 0 0 0 0
* GigabitEthernet1/0/11 0 0 0 0 124000 88 239000 110 0
* GigabitEthernet1/0/12 0 0 0 394 9691000 1647 3418000 1423 0
* GigabitEthernet2/0/1 0 0 0 0 345000 89 221000 124 0
GigabitEthernet2/0/2 0 0 0 0 0 0 0 0 0
* GigabitEthernet2/0/3 0 0 0 0 419000 174 368000 192 0
* GigabitEthernet2/0/4 0 0 0 0 371000 126 176000 147 0
GigabitEthernet2/0/5 0 0 0 0 0 0 0 0 0
GigabitEthernet2/0/6 0 0 0 0 0 0 0 0 0
* GigabitEthernet2/0/7 0 0 0 0 249000 165 839000 192 0
GigabitEthernet2/0/8 0 0 0 0 0 0 0 0 0
* GigabitEthernet2/0/9 0 0 0 0 1423000 414 833000 434 0
* GigabitEthernet2/0/10 0 0 0 0 502000 376 1970000 429 0
GigabitEthernet2/0/11 0 0 0 0 0 0 0 0 0
GigabitEthernet2/0/12 0 0 0 0 0 0 0 0 0
Solved! Go to Solution.
12-07-2010 02:45 PM
Paolo
Isn't a layer 3 switch supposed to correctly count routerdpackets in the corresponding VLAN interface ?
Some do, ie. the higher end L3 switches and some don't. Unfortunately the 3750 doesn't. It is a hardware limitation of the platform. All the SVI counters show is -
1) management traffic to that actual vlan ie. if you telnetted to the SVI ip address
2) any packets that are routed between vlans but are not hardware switched ie. they are sent to the main CPU
Jon
12-07-2010 02:45 PM
Paolo
Isn't a layer 3 switch supposed to correctly count routerdpackets in the corresponding VLAN interface ?
Some do, ie. the higher end L3 switches and some don't. Unfortunately the 3750 doesn't. It is a hardware limitation of the platform. All the SVI counters show is -
1) management traffic to that actual vlan ie. if you telnetted to the SVI ip address
2) any packets that are routed between vlans but are not hardware switched ie. they are sent to the main CPU
Jon
12-07-2010 04:24 PM
Yes, I see.
I had expected that the genious hardware team would have put a counter for that, wasn't the case.
Or maybe marketing forgot to specify, and they got away with that
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide