[202305][SNMP][IPv6]: Revert PRs to support SNMP over IPv6 (#16649)

* Revert "[SNMP][IPv6]: Fix to use link local IPv6 address as snmp agentAddress (#16013)"

This reverts commit ebe8c8c223.

* Revert "[SNMP][IPv6]: Fix SNMP IPv6 reachability issue in certain scenarios (#15487) (#15874)"

This reverts commit 83aa8b8180.

dockers/docker-snmp/snmpd.conf.j2

@@ -13,47 +13,12 @@
 #  AGENT BEHAVIOUR
 #
 
-# Listen for connections on all ip addresses, including eth0, ipv4 lo for multi-asic platform
+#  Listen for connections on all ip addresses, including eth0, ipv4 lo
-# Listen on managment and loopback0 ips for single asic platform
 #
-{% macro protocol(ip_addr) %}
-{%- if ip_addr|ipv6 -%}
-{{ 'udp6' }}
-{%- else -%}
-{{ 'udp' }}
-{%- endif -%}
-{% endmacro %}
-
 {% if SNMP_AGENT_ADDRESS_CONFIG %}
 {% for (agentip, port, vrf) in SNMP_AGENT_ADDRESS_CONFIG %}
-agentAddress {{ protocol(agentip) }}:[{{ agentip }}]{% if port %}:{{ port }}{% endif %}{% if vrf %}%{{ vrf }}{% endif %}{{ "" }}
+agentAddress {{ agentip }}{% if port %}:{{ port }}{% endif %}{% if vrf %}%{{ vrf }}{% endif %}{{ "" }}
 {% endfor %}
-{% elif NAMESPACE_COUNT is not defined or NAMESPACE_COUNT|int <= 1 %}
-{% if MGMT_INTERFACE is defined %}
-{% for intf, ip in MGMT_INTERFACE %}
-{% set agentip = ip.split('/')[0]|lower %}
-{% set zoneid = '' %}
-# Use interface as zoneid for link local ipv6
-{% if agentip.startswith('fe80') %}
-{% set zoneid = '%' + intf %}
-{% endif %}
-agentAddress {{ protocol(agentip) }}:[{{ agentip }}{{ zoneid }}]:161
-{% endfor %}
-{% endif %}
-{% if LOOPBACK_INTERFACE is defined %}
-{% for lo in LOOPBACK_INTERFACE %}
-{% if lo | length == 2 %}
-{% set intf = lo[0] %}
-{% set agentip = lo[1].split('/')[0]|lower %}
-{% set zoneid = '' %}
-# Use interface as zoneid for link local ipv6
-{% if agentip.startswith('fe80') %}
-{% set zoneid = '%' + intf %}
-{% endif %}
-agentAddress {{ protocol(agentip) }}:[{{ agentip }}{{ zoneid }}]:161
-{% endif %}
-{% endfor %}
-{% endif %}
 {% else %}
 agentAddress udp:161
 agentAddress udp6:161

dockers/docker-snmp/start.sh

@@ -16,14 +16,11 @@ mkdir -p /etc/ssw /etc/snmp
 # Parse snmp.yml and insert the data in Config DB
 /usr/bin/snmp_yml_to_configdb.py
 
-ADD_PARAM=$(printf '%s {"NAMESPACE_COUNT":"%s"}' "-a" "$NAMESPACE_COUNT")
-
 SONIC_CFGGEN_ARGS=" \
     -d \
     -y /etc/sonic/sonic_version.yml \
     -t /usr/share/sonic/templates/sysDescription.j2,/etc/ssw/sysDescription \
     -t /usr/share/sonic/templates/snmpd.conf.j2,/etc/snmp/snmpd.conf \
-    $ADD_PARAM \
 "
 
 sonic-cfggen $SONIC_CFGGEN_ARGS