Добрый день!
Помогите, пожалуйста, побороть отпадения L3 на DES-3526.
Есть несколько сотен свичей, все DES-3526, топология - звезда, цепочки не больше 5 свичей, в центре циска, на всех свичах прошивка 5.01.B65. Включён dhcp relay и dhcp snooping.
Регулярно случайным образом залипают свичи по всей сети, статистически равномерно, а именно: перестаёт пингаться, если за ним есть свичи - то они доступны, от абонов на залипшем свиче приходит opt82 с ip адресом свича 0.0.0.0, потом у абонов начинаются проблемы с доступом. Лечится перезагрузкой свича по питанию.
Прочитал форум, много раз эта тема всплывала, но конкретный рецепт так и не нарыл.
По логам dhcp сервера идёт мощный флуд dhcp запросов от свичей с аплинковыми портами в opt82, при этом приходит и легальный запрос, и он же, но с аплинковыми портами ещё от нескольких десятков свичей, которые территориально никак не связаны.
Подскажите, пожалуйста, как побороть флуд, исходящий от свичей, и залипание L3 на них?
От свичей требуется:
1. Защита от петли на порту - loopback detection
2. Защита от петли между портами - stp
3. dhсp snooping в клиентском влане
4. dhcp relay с opt82
5. работающий мультикаст
Вполне допускаю, что причина - мои кривые руки, если так, то подскажите, пожалуйста, что не так в конфиге.
Конфиг свичей прилагаю:
#-------------------------------------------------------------------
# DES-3526 Configuration
#
# Firmware: Build 5.01.B65
# Copyright(C) 2008 D-Link Corporation. All rights reserved.
#-------------------------------------------------------------------
# BASIC
config serial_port baud_rate 9600 auto_logout 10_minutes
enable telnet 23
enable web 80
# ACCOUNT LIST
create account admin admin encrypt sha_1 *@&0873587345DP3468685746
# PASSWORD ENCRYPTION
enable password encryption
config terminal_line default
# BNR
config command_prompt default
# STORM
config traffic control_trap none
config traffic control 1-5 broadcast disable multicast disable unicast disable action drop threshold 128000
# LOOP_DETECT
enable loopdetect
config loopdetect recover_timer 60
config loopdetect interval 10
config loopdetect mode port-based
config loopdetect ports 1-24 state enabled
config loopdetect ports 25-26 state disabled
# GM
config sim candidate
disable sim
config sim dp_interval 30
config sim hold_time 100
# SYSLOG
disable syslog
config system_severity trap information
config system_severity log information
# QOS
config scheduling 0 max_packet 0 max_latency 0
config scheduling 1 max_packet 0 max_latency 0
config scheduling 2 max_packet 0 max_latency 0
config scheduling 3 max_packet 0 max_latency 0
config 802.1p user_priority 0 1
config 802.1p user_priority 1 0
config 802.1p user_priority 2 0
config 802.1p user_priority 3 1
config 802.1p user_priority 4 2
config 802.1p user_priority 5 2
config 802.1p user_priority 6 3
config 802.1p user_priority 7 3
config 802.1p default_priority 1-26 0
config bandwidth_control 1-26 rx_rate no_limit tx_rate no_limit
# MIRROR
disable mirror
# TRAF-SEGMENTATION
config traffic_segmentation 1-26 forward_list 1-26
# PORT
config ports 1-24 speed auto flow_control disable mdix auto learning enable state enable trap enable
config ports 25-26 medium_type copper speed auto flow_control disable mdix auto learning enable state enable trap enable
config ports 25-26 medium_type fiber speed auto flow_control disable learning enable state enable trap enable
# PORT_LOCK
disable port_security trap_log
config port_security ports 1-26 admin_state disable max_learning_addr 1 lock_address_mode DeleteOnReset
# 8021X
disable 802.1x
config 802.1x auth_protocol radius_eap
config 802.1x capability ports 1-26 none
config 802.1x auth_parameter ports 1-26 direction both port_control auto quiet_period 60 tx_period 30 supp_timeout 30 server_timeout 30 max_req 2 reauth_period 3600 enable_reauth disable
# SNMPv3
delete snmp user initial
delete snmp group initial
delete snmp view restricted all
delete snmp view CommunityView all
config snmp engineID 800000ab03001e589ec0f0
create snmp view restricted 1.3.6.1.2.1.1 view_type included
create snmp view restricted 1.3.6.1.2.1.11 view_type included
create snmp view restricted 1.3.6.1.6.3.10.2.1 view_type included
create snmp view restricted 1.3.6.1.6.3.11.2.1 view_type included
create snmp view restricted 1.3.6.1.6.3.15.1.1 view_type included
create snmp view CommunityView 1 view_type included
create snmp view CommunityView 1.3.6.1.6.3 view_type excluded
create snmp view CommunityView 1.3.6.1.6.3.1 view_type included
create snmp group initial v3 noauth_nopriv read_view restricted notify_view restricted
create snmp group ReadGroup v1 read_view CommunityView notify_view CommunityView
create snmp group ReadGroup v2c read_view CommunityView notify_view CommunityView
create snmp group WriteGroup v1 read_view CommunityView write_view CommunityView notify_view CommunityView
create snmp group WriteGroup v2c read_view CommunityView write_view CommunityView notify_view CommunityView
create snmp user initial initial
# MANAGEMENT
enable snmp traps
enable snmp authenticate traps
config snmp system_name D-Link
disable rmon
# VLAN
disable asymmetric_vlan
config vlan default delete 1-26
config vlan default advertisement enable
config vlan default add forbidden 1-26
create vlan MANAGEMENT tag 21
config vlan MANAGEMENT add tagged 25-26
config vlan MANAGEMENT advertisement disable
create vlan CLIENTS tag 10
config vlan CLIENTS add tagged 25-26
config vlan CLIENTS add untagged 1-24
config vlan CLIENTS advertisement disable
disable gvrp
config gvrp 1-24 state disable ingress_checking enable acceptable_frame admit_all pvid 10
config gvrp 25-26 state disable ingress_checking enable acceptable_frame admit_all pvid 1
# FDB
config fdb aging_time 300
config multicast port_filtering_mode 1-24 filter_unregistered_groups
config multicast port_filtering_mode 25-26 forward_all_groups
# MAC_ADDRESS_TABLE_NOTIFICATION
config mac_notification interval 1 historysize 1
disable mac_notification
config mac_notification ports 1-26 disable
# STP
config stp version rstp
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 6 fbpdu enable
config stp priority 32768 instance_id 0
config stp hellotime 2
config stp mst_config_id name 00:1E:58:9E:C0:F0 revision_level 0
enable stp
config stp ports 1-24 externalCost auto edge true p2p auto state enable
config stp ports 1-24 fbpdu enable
config stp ports 1-24 restricted_role true
config stp ports 1-24 restricted_tcn true
config stp mst_ports 1-26 instance_id 0 internalCost auto priority 128
config stp ports 25-26 externalCost auto edge false p2p auto state enable
config stp ports 25-26 fbpdu disable
config stp ports 25-26 restricted_role false
config stp ports 25-26 restricted_tcn false
# SSH
config ssh server maxsession 8
config ssh server contimeout 300
config ssh server authfail 2
config ssh server rekey never
config ssh server port 22
disable ssh
# SSL
disable ssl
enable ssl ciphersuite RSA_with_RC4_128_MD5
enable ssl ciphersuite RSA_with_3DES_EDE_CBC_SHA
enable ssl ciphersuite DHE_DSS_with_3DES_EDE_CBC_SHA
enable ssl ciphersuite RSA_EXPORT_with_RC4_40_MD5
config ssl cachetimeout timeout 600
# SAFE_GUARD
config safeguard_engine state enable cpu_utilization rising_threshold 100 falling_threshold 20 trap_log disable
# TIMERANGE
# ACL
disable cpu_interface_filtering
# SNTP
disable sntp
config time_zone operator - hour 6 min 0
config sntp primary 0.0.0.0 secondary 0.0.0.0 poll-interval 720
config dst disable
# IPBIND
config address_binding ip_mac ports 1-24 state enable
config address_binding ip_mac ports 1-24 allow_zeroip enable
config address_binding ip_mac ports 1-26 forward_dhcppkt disable
disable address_binding acl_mode
enable address_binding trap_log
enable address_binding dhcp_snoop
config address_binding dhcp_snoop max_entry ports 1-26 limit 5
# FILTER
config filter dhcp_server ports 1-24 state enable
# ARP_Spoofing_Prevention
# ROUTE
create iproute default 192.168.20.1 1
# SNOOP
enable igmp_snooping
create igmp_snooping multicast_vlan IPTV 23
config igmp_snooping multicast_vlan IPTV member_port 1-24 source_port 25-26 state enable replace_source_ip 0.0.0.0
config igmp_snooping IPTV host_timeout 260 router_timeout 260 leave_timer 2 state enable
config igmp_snooping querier IPTV query_interval 125 max_response_time 10 robustness_variable 2
config igmp_snooping querier IPTV last_member_query_interval 1 state disable
config limited_multicast_addr ports 1-26 access deny state disable
# LACP
config link_aggregation algorithm mac_source
config lacp_port 1-26 mode passive
# GVLAN
# IP
config ipif System vlan MANAGEMENT ipaddress 192.168.20.2/23 state enable
disable autoconfig
# ARP
config arp_aging time 20
config gratuitous_arp send ipif_status_up enable
config gratuitous_arp send dup_ip_detected enable
config gratuitous_arp learning enable
# LLDP
disable lldp
config lldp message_tx_interval 30
config lldp tx_delay 2
config lldp message_tx_hold_multiplier 4
config lldp reinit_delay 2
config lldp notification_interval 5
config lldp ports 1-26 notification disable
config lldp ports 1-26 admin_status tx_and_rx
# ACCESS_AUTHENTICATION_CONTROL
config authen_login default method local
config authen_enable default method local_enable
config authen application console login default
config authen application console enable default
config authen application telnet login default
config authen application telnet enable default
config authen application ssh login default
config authen application ssh enable default
config authen application http login default
config authen application http enable default
config authen parameter response_timeout 0
config authen parameter attempt 3
config authen enable_admin all state enable
disable authen_policy
# DHCP_RELAY
enable dhcp_relay
config dhcp_relay hops 12 time 0
config dhcp_relay option_82 state enable
config dhcp_relay option_82 check enable
config dhcp_relay option_82 policy replace
config dhcp_relay option_82 remote_id default
config dhcp_relay option_60 state disable
config dhcp_relay option_60 default mode drop
config dhcp_relay option_61 state disable
config dhcp_relay option_61 default drop
config dhcp_relay add ipif System 192.168.21.254
# DHCP_LOCAL_RELAY
disable dhcp_local_relay
config dhcp_local_relay vlan vlanid 10,21 state enable
#-------------------------------------------------------------------
# End of configuration file for DES-3526
#-------------------------------------------------------------------