HSRP lossing 50%-75% of the packets

[superduperlopez]

Hi,

I'm running HSRP in a small LAN.... I am using two 800 series which are connected to a 2960Switch... the configuration in the routers is as per below....

For Router-2:

interface Ethernet0

ip address 192.168.0.3 255.255.255.0

standby 1 ip 192.168.0.4

standby 1 priority 200

standby 1 preempt

hold-queue 100 out

For Router-1:

interface Ethernet0

ip address 192.168.0.3 255.255.255.0

standby 1 ip 192.168.0.4

standby 1 priority 101

standby 1 preempt

hold-queue 100 out

The HSRP seems to be working, i.e. for Router-1, the State is Standby and for Router-2, the State is Active.

I also have a laptop connected to the 2960Switch with IP address 192.168.0.1, default-gateway 192.168.0.4 (the virtual address)

Now my problem.......when I ping from the laptop to the virtual address I get a 50%-75% lost every time......and the same happens when I ping from the router to the laptop.......

Any ideas as of why I dont get a 0% loss????

Thank you for any help

[pkhatri]

Hi,

This may not be the cause of the problem but why are you using the same IP address (192.168.0.3) on both of your Ethernet interfaces. They need to be different. The virtual HSRP IP address is the one that is shared by them.

Hope that helps - pls do remember to rate posts that help.

Paresh

[pkhatri]

Yu might want to try and clear the ARP cache on your laptop and then re-do the tests...

Paresh

[superduperlopez]

I cleared the arp lists in the laptop, the switch and the active router and I am still geting 50%-75% packet lost when pinging........

now when I do an "arp -a" on the laptop there is one entry to 192.168.0.4 as per below

192.168.0.4 00-00-0c-07-ac-01 dynamic

However, when I do a show arp in the switch the list is blank......even after having done a ping from the laptop........I wonder if this is because both routers are using the same MAC address and this is confusing the switch i.e. it is sending half of the packets to router-1 and the other half to router-2???

Could this be a problem caused by using HSRP over Ethernet???

again, thank you for any comments

[ankurbhasin]

Hi Friend,

When you initiate a ping from laptop the arp entry will be learned on the laptop but WHY will switch get an arp entry.

If you initiate a ping from switch to the HSRP ip address and if you get a reply you will see the arp entry learned on the switch also.

You will only geta ping reply if the switch ip address and the router hsrp address are in same subnet. Also try to manually configure the speed and duplex setting son router and laptop and the switchports on which both the router and laptop is connected and check the results.

HTH, if yes please rate the post.

Ankur

[superduperlopez]

Hi,

I manually configured all the ports in the switch and the routers but I am still having the same problems...

It seems to me that the problem is in the switch as I can ping from the laptop to the switch no problem, but when pinging from the switch to the virtual address lots of packets get lost...

[ankurbhasin]

Hi Friend,

Once you ping from the switch you see a packet loss so seems to be a problem between a switch and router now.

Can you also post the output "sh int " from the switch as well as router and if possible can you try changing the cable between switch and router.

Regards,

Ankur

[superduperlopez]

Hi again,

output from switch interface that connects to Active router....

Switch#sh int fa0/3

FastEthernet0/3 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0017.5a65.0705 (bia 0017.5a65.0705)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:40, output 00:00:01, 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

3998 packets input, 312822 bytes, 0 no buffer

Received 3367 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 3283 multicast, 0 pause input

0 input packets with dribble condition detected

11470 packets output, 852690 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

and output of interface from active router

Router_2#sh int ethernet 0

Ethernet0 is up, line protocol is up

Hardware is PQUICC Ethernet, address is 0000.0c07.ac01 (bia 0014.a8ab.6d28)

Internet address is 192.168.0.3/24

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s

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

Last input 00:00:00, output 00:00:00, 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: 0/100 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5287 packets input, 422915 bytes, 0 no buffer

Received 4791 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

4892 packets output, 355970 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

I also swapped cables for one that I am 100% sure it works but still same problem.......

[superduperlopez]

Hi again,

output from switch interface that connects to Active router....

Switch#sh int fa0/3

FastEthernet0/3 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0017.5a65.0705 (bia 0017.5a65.0705)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:40, output 00:00:01, 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

3998 packets input, 312822 bytes, 0 no buffer

Received 3367 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 3283 multicast, 0 pause input

0 input packets with dribble condition detected

11470 packets output, 852690 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

and output of interface from active router

Router_2#sh int ethernet 0

Ethernet0 is up, line protocol is up

Hardware is PQUICC Ethernet, address is 0000.0c07.ac01 (bia 0014.a8ab.6d28)

Internet address is 192.168.0.3/24

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s

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

Last input 00:00:00, output 00:00:00, 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: 0/100 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5287 packets input, 422915 bytes, 0 no buffer

Received 4791 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

4892 packets output, 355970 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

I also swapped cables for one that I am 100% sure it works but still same problem.......

[superduperlopez]

Hi again,

output from switch interface that connects to Active router....

Switch#sh int fa0/3

FastEthernet0/3 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0017.5a65.0705 (bia 0017.5a65.0705)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:40, output 00:00:01, 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

3998 packets input, 312822 bytes, 0 no buffer

Received 3367 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 3283 multicast, 0 pause input

0 input packets with dribble condition detected

11470 packets output, 852690 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

and output of interface from active router

Router_2#sh int ethernet 0

Ethernet0 is up, line protocol is up

Hardware is PQUICC Ethernet, address is 0000.0c07.ac01 (bia 0014.a8ab.6d28)

Internet address is 192.168.0.3/24

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s

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

Last input 00:00:00, output 00:00:00, 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: 0/100 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5287 packets input, 422915 bytes, 0 no buffer

Received 4791 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

4892 packets output, 355970 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

I also swapped cables for one that I am 100% sure it works but still same problem.......

[superduperlopez]

Hi again,

output from switch interface that connects to Active router....

Switch#sh int fa0/3

FastEthernet0/3 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0017.5a65.0705 (bia 0017.5a65.0705)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:40, output 00:00:01, 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

3998 packets input, 312822 bytes, 0 no buffer

Received 3367 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 3283 multicast, 0 pause input

0 input packets with dribble condition detected

11470 packets output, 852690 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

and output of interface from active router

Router_2#sh int ethernet 0

Ethernet0 is up, line protocol is up

Hardware is PQUICC Ethernet, address is 0000.0c07.ac01 (bia 0014.a8ab.6d28)

Internet address is 192.168.0.3/24

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s

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

Last input 00:00:00, output 00:00:00, 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: 0/100 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5287 packets input, 422915 bytes, 0 no buffer

Received 4791 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

4892 packets output, 355970 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

I also swapped cables for one that I am 100% sure it works but still same problem.......

[superduperlopez]

Hi again,

output from switch interface that connects to Active router....

Switch#sh int fa0/3

FastEthernet0/3 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0017.5a65.0705 (bia 0017.5a65.0705)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:40, output 00:00:01, 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

3998 packets input, 312822 bytes, 0 no buffer

Received 3367 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 3283 multicast, 0 pause input

0 input packets with dribble condition detected

11470 packets output, 852690 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

and output of interface from active router

Router_2#sh int ethernet 0

Ethernet0 is up, line protocol is up

Hardware is PQUICC Ethernet, address is 0000.0c07.ac01 (bia 0014.a8ab.6d28)

Internet address is 192.168.0.3/24

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s

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

Last input 00:00:00, output 00:00:00, 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: 0/100 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5287 packets input, 422915 bytes, 0 no buffer

Received 4791 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

4892 packets output, 355970 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

I also swapped cables for one that I am 100% sure it works but still same problem.......

[pkhatri]

Hi,

Your router interface is 10Mbps but your switch interface is set to 100Mbps. Set the switch interface speed to 10Mbps and you should be okay.

Hope that helps - pls do remember to rate posts that help.

Paresh

[superduperlopez]

Hello....

I changed the speed on the interfaces so that both router and switch are using the same but I'm still having the same problem....

Router_2#sh int fa1

FastEthernet1 is up, line protocol is up

Hardware is FastEthernet, address is 0000.0000.0000 (bia 0000.0000.0000)

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, 100BaseTX/FX

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

Last input never, 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: 0/0 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

5065 packets input, 0 bytes

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

13881 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 5 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

[pkhatri]

Have you changed the physical interface on the router ? Your original post indicated a 10Mbps interface (Ethernet) whereas this one indicates a 100Mbps interface (FastEthernet). Also, this one indicates a MAC address of all zeros...

Paresh