05-15-2019 12:18 PM - edited 05-15-2019 12:22 PM
Hello,
Hope some can help and identify an issue I am facing. Below is my lab topology in GNS3, using nxsosv-9k-7.0.3.16.2 image.
ASW has links to NXS1 and NXS2 in a port channel. Everything works fine in the normal scenario, I can ping both NXS and HSRP. When I fail one of the link, from NXS1 to ASW, I cannot ping NXS2 or the HSRP IP but odd, I can ping NXS1. In the failure scenario, the only path for ASW is via NXS2, so unsure why I can't ping it but can ping NXS1 over vpc peer link.
Before the failure, MAC address table of ASW shows path for NXS1 & HSRP via Gi0/1. After the failure, it correctly updates the MAC table to Gi0/0 for all three IPs. So unsure what the issue and what I am doing wrong.
Any help is highly appreciated, all configs and outputs attached. Thanks in advance.
==========Ping ARP and MAC table on ASW==========
Switch#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 10/11/14 ms
Switch#ping 192.168.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Switch#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Switch#sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.1 2 0000.0c07.ac05 ARPA Vlan30
Internet 192.168.1.2 10 5005.0001.0007 ARPA Vlan30
Internet 192.168.1.3 10 5005.0002.0007 ARPA Vlan30
Internet 192.168.1.254 - 5005.0003.801e ARPA Vlan30
Switch#sh mac address-table
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
30 0000.0c07.ac05 DYNAMIC Gi0/0
30 5005.0001.0007 DYNAMIC Gi0/0
30 5005.0002.0007 DYNAMIC Gi0/0
Total Mac Addresses for this criterion: 3
Switch#
05-15-2019 01:33 PM
Issue resolved.
Since this was GNS3 lab, even though NXS1 interface to ASW is shutdown, ASW still has its interface up. I shut the Gi1 on ASW and everything works fine as expected. Not entirely sure why it didn't work in the first place even though MAC table appears correct though.
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