Troubleshooting Network Issues: A Comprehensive Guide
It will reject RADIUS server change of authorization (CoA) messages with timestamps that are more than one minute old|monitor thresholds to generate alerts
RMON alarm|A Type 2 metric stays the same as the external route is advertised, while a Type 1 metric increments with internal OSPF link costs|Set command authorization to RADIUS, also set RADIUS for aaa authentication ssh login and aaa authentication ssh enable|Divide the AS into different areas, and aggregate routes between them|RADIUS MAC-Auth should be enabled on the guest ports|users to change values in the URL that directs them to the captive portal|a RADIUS server, such as Aruba ClearPass|that Switch-2 has PIM-DM enabled on VLAN
10|The RADIUS shared secret does not match on the switch and the server|Configure backplane switching settings on each switch while disconnected. Make sure the desired commander has member ID 1. Then, connect the switches|vlan–
Out|create a QoS policyan extended IPv4 ACL|The name of the ACL applied to VLAN 2 is incorrect |It validates that BGP messages arrive from an authorized device|authentication login privileges|3-24|The switches can now prevent ARP poisoning attacks and do not interfere with legitimate communications|Override the DSCP or priority applied directly to an interface|It can supplement MSTP on access switch edge ports to detect loops in more circumstances|Double-check the settings with the Mobility Controller administrators because the planned configuration is incomplete with the switch settings|Enter a static route to 192.0.2.0/24 to the black hole|It denies both frames|mesh topology
Aruba3810M|Only Switch-2 will respond, and it will respond with the virtual MAC address for VRID 2|Client 3 and Client 4, but not Client 2|It accepts client packets, but drops packets from a DHCP server|Define trkl as a trusted DHCP port|Eavesdrop prevention should be disabled when report security is in limited-continuous mode|an extended IP ACL that selects the TCP traffic, apply the ACL to the mirror session, and specif’ interfaces in VLAN 2 as monitor ports|Switch-2 does not filter any of this traffic with the ACL, and the session establishes successful|Config ure graceful restart on all of the OSPF routing devices on VLAN 100|LSUrouterNetwor kto every OSPF router in the network to which the LSU applies|This is the expected behavior, and Switch-1 should still be able to route traffic for Client-1|Apply LMA to all edge switch ports, and set the unauth VLAN to the user VLAN|Replace expired certificates on the switches and set their usage to captive portal since some guests have an HTTPS homepage|After two consecutive missed keep-alive packets, Switch-1 disables interface 1, and the interface stays disabled until the issue is fixed|Set the BGP AS number to 46501|The device MAC address matches a default MAC group, which is enabled but not necessarily associated with a profile|Configure RMON receives on the switches|Each AOS-Switch will send all RADIUS requests to the first server on the list unless that server becomes unreachable|The area range is incorrect on Switch-1 and missing on Switch-2|Re-configure the mirror endpoint command on Switch-2 with the IP addresses reversed in order|Change the order in which the RADIUS servers are specified on half of the switches|10.0.0.0/20|Set a cost of 15 in the redistribute static command on Switch-2|backplane stacking modules and cables|OSPF routing switches choose the best intra area routes based on Area 1 links only1|10.1.0.10|an outbound rate limit on each edge port|on the VLAN to which the user devices are assigned|It forwards it with normal priority and 802.1p 5|Ensure client devices trust the RADIUS server certificate|LLDP
MAD or VLAN MAD|a hardware issue, such as a broken cable|The controllers cannot support tunneled node with AOS-Switches when they are managed by the Mobility Master|if interface connects to an Aruba AP, the switch marks all traffic received on the interface with a higher than default priority value|The switch must have an IP address on that VLAN|The path crosses no VLAN boundaries|The administrator enables graceful restart, or nonstop switching, on just one of the routers|to use on high-bandwidth routed connections|What the next hop is for the unicast route that Switch-1 uses to reach 10.2.2.2|Enable SNMPv3 restricted mode|Set the OSPF administrative distance on Switch-2 higher than 110|Its remote-AS is the same as the AOS-Switch BGP AS|RPVST+|TCPorUDPGREorICMPan extended IP ACL only|Enable BPDU protection with a timeout period| Configure graceful restart, or nonstop OSPF, on Switch-1 and Switch-2, with a proper timer|privileged-mode login authentication|Implement a sequenced reboot of the new software|Specify the log option for the ACL entry, and enable ACL debugging|