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In addition to sending traffic between hosts, the configuration shown in both topologies can be validated with the commands shown in this section. The validation for the Layer 2 topology only references sections show vlt through show vrrp brief.
Note: For more information on commands and output, see the Command Line Reference Guide for the applicable switch (links to documentation are provided in Documentation).
This section covers the validation of the S4048-ON leaf switches running OS10EE, as well as the Z9100-ON spine switches.
Command and output examples are provided for one spine and one leaf. Command output on other switches is similar.
When BGP is configured, this command shows the status of all BGP connections. Each spine has four neighbors (the four leafs), and each leaf has two neighbors (the two spines).
Z9100-Spine1# show ip bgp summary
BGP router identifier 10.0.1.1 local AS number 64601
Neighbor AS MsgRcvd MsgSent Up/Down State/Pfx
192.168.1.1 64701 2119 2146 00:55:27 3
192.168.1.3 64702 2101 2113 00:54:38 3
192.168.1.5 64703 2291 2322 01:37:49 3
192.168.1.7 64704 2290 2310 01:37:36 3
S4048-Leaf1#show ip bgp summary
BGP router identifier 10.0.2.1 local AS number 64701
Neighbor AS MsgRcvd MsgSent Up/Down State/Pfx
192.168.1.0 64601 131660 131649 3d:21:49:06 10
192.168.2.0 64602 131685 131625 3d:21:49:04 10
On switches with BGP configured, this command is used to verify the BGP entries in the Routing Information Base (RIB). Entries with multiple paths shown are used with ECMP. The two server networks in this example, 10.60.1.0 and 172.16.1.0, each has two paths from Z9100-Spine1, one through each leaf.
The first set of routes with a subnet mask of /32 are the IPs configured for router IDs.
S4048-Leaf1 has two paths to all other leafs and two paths to Server 3’s network, 172.16.2.0. There is one path through each spine. If all paths do not appear, make sure the maximum-paths statement in the BGP configuration is equal to or greater than the number of spines in the topology.
Z9100-Spine1# show ip route bgp
Codes: C - connected
S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, * - candidate default,
+ - summary route, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
-------------------------------------------------------------------------------
B EX 10.0.1.2/32 via 192.168.1.1 20/0 00:54:54
via 192.168.1.3
via 192.168.1.5
via 192.168.1.7
B EX 10.0.2.1/32 via 192.168.1.1 20/0 00:55:44
B EX 10.0.2.2/32 via 192.168.1.3 20/0 00:54:54
B EX 10.0.2.3/32 via 192.168.1.5 20/0 01:38:06
B EX 10.0.2.4/32 via 192.168.1.7 20/0 01:37:52
B EX 172.16.1.0/24 via 192.168.1.1 20/0 00:54:54
via 192.168.1.3
B EX 172.16.2.0/24 via 192.168.1.5 20/0 01:37:49
via 192.168.1.7
S4048-Leaf1# show ip route bgp
Codes: C - connected
S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, * - candidate default,
+ - summary route, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
-------------------------------------------------------------------------------
B EX 10.0.1.1/32 via 192.168.1.0 20/0 01:00:13
B EX 10.0.1.2/32 via 192.168.2.0 20/0 01:00:11
B EX 10.0.2.2/32 via 192.168.1.0 20/0 00:59:23
via 192.168.2.0
B EX 10.0.2.3/32 via 192.168.1.0 20/0 01:00:11
via 192.168.2.0
B EX 10.0.2.4/32 via 192.168.1.0 20/0 01:00:11
via 192.168.2.0
B EX 172.16.2.0/24 via 192.168.1.0 20/0 01:00:11
via 192.168.2.0
Note: The command show ip route <cr> can also be used to verify the information above, as well as static routes and direct connections.
This command is used to validate VLT configuration status on leaf switches in this topology. The VLTi Link Status must be up. The role of one switch in the VLT pair is primary (not shown), and its peer switch is assigned the secondary role. Ensure Peer-Routing is shown as enabled.
S4048-Leaf1# show vlt 127
Domain ID : 127
Unit ID : 2
Role : secondary
Version : 1.0
Local System MAC address : 64:00:6a:e6:b6:14
VLT MAC address : f4:8e:38:20:44:29
IP address : fda5:74c8:b79e:1::2
Delay-Restore timer : 90 seconds
Peer-Routing : Enabled
Peer-Routing-Timeout timer : 0 seconds
VLTi Link Status
port-channel1000 : up
VLT Peer Unit ID System MAC Address Status IP Address Version
--------------------------------------------------------------------------------
1 f4:8e:38:20:44:29 up fda5:74c8:b79e:1::1 1.0
This command is used to verify that the back-up destination is set correctly and that the peer heartbeat is up.
S4048-Leaf1# show vlt 127 backup-link
VLT Backup Link
------------------------
Destination: 100.67.170.14
Peer Heartbeat status: Up
This command is used to validate VLT LAG status on leaf switches in this topology. This command shows the status and active VLANs of all VLT LAGs. The local and peer status must both be up.
S4048-Leaf1# show vlt 127 vlt-port-detail
vlt-port-channel ID : 1
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
1 port-channel1 up 1 1
* 2 port-channel1 up 1 1
vlt-port-channel ID : 3
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
1 port-channel3 up 1 1
* 2 port-channel3 up 1 1
vlt-port-channel ID : 5
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
1 port-channel5 up 1 1
* 2 port-channel5 up 1 1
vlt-port-channel ID : 101
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
1 port-channel101 up 1 1
* 2 port-channel101 up 1 1
vlt-port-channel ID : 102
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
1 port-channel102 up 1 1
* 2 port-channel102 up 1 1
This command highlights configuration issues between VLT peers. Mismatch examples include incompatible VLT configuration settings, VLAN differences, different switch operating system versions, and STP inconsistencies. There should be no output to this command on any switch correctly configured for VLT. If there is, the mismatch must be resolved.
S4048-Leaf1# show vlt 127 mismatch
Peer-routing mismatch:
No mismatch
VLAN mismatch:
No mismatch
VLT VLAN mismatch:
No mismatch
This command is used to validate the UFD status on leaf switches in this topology. Status: Enabled, Up indicates UFD is enabled and no interfaces are currently disabled by UFD.
S4048-Leaf1# show uplink-state-group 1
Uplink State Group: 1, Status: Enabled,up
If an interface happens to be disabled by UFD, the show uplink-state-group command output appears as follows:
Uplink State Group: 1 Status: Enabled, down
Upstream Interfaces:ethernet1/1/49(down) ethernet1/1/50(down)
Downstream Interfaces:port-channel1(disabled) port-channel101(disabled) port-channel102(disabled) port-channel3(disabled) port-channel5(disabled)
Note: When an interface has been disabled by UFD, the show interface command for affected interfaces indicates it is error-disabled as follows:
S4048-Leaf1# show interface port-channel 1
Port-channel 1 is up, line protocol is down(error-disabled[UFD])
--- Output is truncated ---
This command validates that STP is enabled on the leaf switches. All interfaces are forwarding (Sts column shows FWD). One of the leaf switches (S4048-Leaf1 in this example) is the root bridge, and sever-facing interfaces (Po 1,3,5,101,102 in this example) are edge ports.
S4048-Leaf1# show spanning-tree brief
Spanning tree enabled protocol rstp with force-version rstp
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 0, Address 6400.6ae6.b614
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 0, Address 6400.6ae6.b614
We are the root
Configured hello time 2, max age 20, forward delay 15
Flush Interval 200 centi-sec, Flush Invocations 73
Flush Indication threshold 0 (MAC flush optimization is disabled)
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------------------------------------------------------------------------
port-channel1 128.2517 128 1000 FWD 0 0 6400.6ae6.b614 128.2517
port-channel3 128.2519 128 1000 FWD 0 0 6400.6ae6.b614 128.2519
port-channel5 128.2521 128 1000 FWD 0 0 6400.6ae6.b614 128.2521
port-channel101 128.2617 128 1000 FWD 0 0 6400.6ae6.b614 128.2617
port-channel102 128.2618 128 1000 FWD 0 0 6400.6ae6.b614 128.2618
--- Output is truncated ---
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
-------------------------------------------------------------------------------
port-channel1 Desg 128.2517 128 1000 FWD 0 AUTO Yes
port-channel3 Desg 128.2519 128 1000 FWD 0 AUTO Yes
port-channel5 Desg 128.2521 128 1000 FWD 0 AUTO Yes
port-channel101 Desg 128.2617 128 1000 FWD 0 AUTO Yes
port-channel102 Desg 128.2618 128 1000 FWD 0 AUTO Yes
--- Output is truncated ---
This command is used to verify that VRRP is correctly configured and both switches in the VLT have the same virtual address.
S4048-Leaf1# show vrrp brief
Interface Group Priority Prempt State Version Master addr(s) Virtual addr
--------------------------------------------------------------------------------
vlan100 IPv4 100 150 true master-state 2 172.16.1.252 172.16.1.254