Hello,
I have a C4948E-S switch, on 12.2(54)SG1.
I have two VLANs (5,10)...
192.168.5.0/24
192.168.10/24
I've enabled IP routing, ip cef is on by default, also enabled ip multicast routing. With both machines HOST A connected on VLAN 5 and HOST B pointing to the relevent gateway (switches VLAN interface IP)... I have perfect connectivity.
However, when using iperf, if I connect both hosts to the same VLAN I get:
987 MBytes 857 Mbits/sec
However, if they are on seperate VLANs I get the following:
118 MBytes 98.9 Mbits/sec
I also have a 3560X and this performs fine, so there is something wrong with the 4948E... can anyone advise if they have seen this before and what I should do?
Here are some interface diags:
Vlan5 is up, line protocol is up
Hardware is Ethernet SVI, address is
Description: VLAN FIVE
Internet address is 192.168.5.1/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
IPv6 L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
IPv6 L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
820 packets input, 75521 bytes, 0 no buffer
Received 1211 broadcasts (122 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
9512 packets output, 1017536 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Many thanks.