We are using Cisco Catalyst 1000 switch (C100-16P-2G-L to be precise) and having a trouble of passing tagged multicast from one its port to another.
We would like to pass it as it is (tagged), I assume it should be possible but how to configure (we need to pass multicast traffic with vlan id=257)? default configuration definitely doesn't work.
Some additional details related to default configuration:
- tagged (id=257) multicast is not passing through!
- untagged multicast is passing through
- tagged unicast is passing through
This type of switch has vlan=1 as default, so if I send multicast traffic tagged with vlan id=1, it goes out de-tagged - this is not what I need.
Also I found that:
Switch#show topology
Topology Address Family Associated VRF State
base ipv4 default UP
base ipv6 default DOWN
base ipv4 multicast default DOWN
base ipv6 multicast default DOWN
could it be related, and how to change the topology?
These packets are sent from host:
$ sudo mz v_eno1 -v -c 0 -d 1s -B 239.0.0.5 -t udp "dp=32000" -P "AAAA"
IP: ver=4, len=32, tos=0, id=0, frag=0, ttl=255, proto=17, sum=0, SA=198.19.4.250, DA=239.0.0.5,
payload=[see next layer]
UDP: sp=0, dp=32000, len=12, sum=0,
payload=41:41:41:41
....
Captured on host:
$ tcpdump -nn "udp port 32000 or (vlan and udp port 32000)" -e -i eno1 -Xvvv
16:20:02.364860 f6:e0:32:f0:7b:74 > 01:00:5e:00:00:05, ethertype 802.1Q (0x8100), length 50: vlan 257, p 0, ethertype IPv4, (tos 0x0, ttl 255, id 26302, offset 0, flags [none], proto UDP (17), length 32)
198.19.4.250.0 > 239.0.0.5.32000: [udp sum ok] UDP, length 4
0x0000: 4500 0020 66be 0000 ff11 9afb c613 04fa E...f...........
0x0010: ef00 0005 0000 7d00 000c 4640 4141 4141 ......}...F@AAAA
UPDATE 1
trying to setup trunk on incoming/outgoing ports, but:
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface GigabitEthernet1/0/2
Switch(config-if)#switchport mode trunk
Switch(config-if)#vlan dot1q tag native
^
% Invalid input detected at '^' marker.
Switch(config-if)#switchport trunk ?
allowed Set allowed VLAN characteristics when interface is in trunking mode
native Set trunking native characteristics when interface is in trunking
mode
pruning Set pruning VLAN characteristics when interface is in trunking mode
should I select trunk mode?
UPDATE 2
Current setting for one of the ports:
Switch#show interfaces GigabitEthernet1/0/4 switchport
Name: Gi1/0/4
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: disabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
UPDATE 3
After trying to setup trunk on 2 ports:
interface GigabitEthernet1/0/2
switchport trunk allowed vlan 257
switchport trunk native vlan 257
switchport mode trunk
interface GigabitEthernet1/0/4
switchport trunk allowed vlan 257
switchport trunk native vlan 257
switchport mode trunk
still not passing through....
