Hi,
This seems like a very simple problem but I can't seem to figure out why it isn't working. The topology is very simple.
One Nexus 9k switch connected to a stack of two 9500 switches over two ports (port-channel). The port-channel is configured as trunk and vlans are created and allowed on both ends.
On the nexus the vlan interface is UP UP and can ping itself. On the 9500 the VLAN interface is UP DOWN.
The mac address table on 9500 is showing learnt mac addresses from the Trunk link.
I'm assuming there is some configuration on IOS-XE that I'm missing.
9500 ( (CAT9K_IOSXE), Version 17.3.5)
Nexus 9k ( System version: 7.0(3)I4(5)0
Pasting the relevant configuration and outputs below for reference:
---------------------------
NEXUS SWITCH
----
vlan 781
interface Vlan781
description L3_781
no shutdown
ip address 10.2.199.2/29
interface port-channel23
switchport mode trunk
switchport trunk allowed vlan 781-783
----------------
N9K-SW-C# show vlan id 781
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
781 VLAN0781 active Po23, Eth1/3, Eth1/4
N9K-SW-C# show mac address-table vlan 781
Legend:
* - primary entry, G - Gateway MAC, (R) - Routed MAC, O - Overlay MAC
age - seconds since last seen,+ - primary entry using vPC Peer-Link,
(T) - True, (F) - False, C - ControlPlane MAC
VLAN MAC Address Type age Secure NTFY Ports
---------+-----------------+--------+---------+------+----+------------------
G 781 a19c.c1f8.2a3a static - F F sup-eth1(R)
N9K-SW-C# show interface vlan 781
Vlan781 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is a19c.c1f8.2a3a
Description: L3_781 Internet Address is 10.2.199.2/29
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
Last clearing of "show interface" counters never
L3 in Switched:
ucast: 0 pkts, 0 bytes
N9K-SW-C# show spanning-tree vlan 781
VLAN0781
Spanning tree enabled protocol rstp
Root ID Priority 25483
Address a19c.c1f8.2a3a
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 25483 (priority 24576 sys-id-ext 781)
Address a19c.c1f8.2a3a
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po41 Desg FWD 3 128.4143 P2p
Po23 Desg FWD 1 128.4165 P2p
Eth1/2 Desg FWD 4 128.1 P2p
-------
9500 SWITCH
-------
interface Vlan781
description L3_781
ip address 10.2.199.1 255.255.255.248
end
interface Port-channel60
description PO-N9K-9500
switchport trunk allowed vlan 781,888
switchport autostate exclude
switchport mode trunk
spanning-tree portfast edge trunk
SW-9500-N#show vlan id 781
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
781 L3_BB_CORE active Po60
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
781 enet 100781 1500 - - - - - 0 0
Remote SPAN VLAN
----------------
Disabled
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
SW-9500-N#show mac address-table vlan 781
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
781 5c31.9250.9cbf STATIC Vl781
781 a89d.21f8.2f8e DYNAMIC Po60
Total Mac Addresses for this criterion: 2
SW-9500-N#
SW-9500-N#show spanning-tree vlan 781
Spanning tree instance(s) for vlan 781 does not exist.
SW-9500-N#
SW-9500-N#show interfaces vlan 781
Vlan781 is up, line protocol is down , Autostate Enabled
Hardware is Ethernet SVI, address is 5c31.9250.9cbf (bia 5c31.9250.9cbf)
Description: L3_781
Internet address is 10.2.199.1/29
MTU 1500 bytes, BW 1000000 Kbit/sec, 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 never, output 07:31:03, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (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
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 packets output, 0 bytes, 0 underruns
Output 0 broadcasts (0 IP multicasts)
0 output errors, 2 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
SW-9500-N#
