Provides instructions for validating and verifying VFR and underlay fragmentation configuration and packet handling using diagnostic commands.
Boost mode
The following is a sample output of the show platform hardware qfp active infrastructure cvla client handles command:
Device# show platform hardware qfp active infrastructure cvla client handles
Handles for cpp 0:
---------------------
Entity name: IPREASS_CVLA_0
Handle: 0xeea45000
Number of allocations: 0
Memory allocated: 0
Entity name: FNF_AOR
Handle: 0xeea0d000
Number of allocations: 0
Memory allocated: 0
Entity name: NBAR_CVLA_ENTITY
Handle: 0xee946000
Number of allocations: 0
Memory allocated: 0
Entity name: FNF Chunk 2
Handle: 0xef929000
Number of allocations: 0
Memory allocated: 0
Entity name: FNF Chunk 1
Handle: 0xef928000
Number of allocations: 0
Memory allocated: 0
--------------------- The boost mode is disabled if entity for IPREASS_CVLA_* is not displayed. Once the boost mode is disabled, the IPREASS_CVLA_* disappears after 64 seconds.
VFR for IPv4 packets
The following is a sample output from the show ip virtual-reassembly command:
Device# show ip virtual-reassembly GigabitEthernet 5
GigabitEthernet5:
Virtual Fragment Reassembly (VFR) is ENABLED [out]
Concurrent reassemblies (max-reassemblies): 16
Fragments per reassembly (max-fragments): 32
Reassembly timeout (timeout): 3 seconds
Drop fragments: OFF
Current reassembly count:0
Current fragment count:0
Total reassembly count:12
Total reassembly timeoutThe example shows if VFR for IPv4 is enabled or not. Virtual Fragment Reassembly (VFR) is ENABLED [out] signifies that VFR is enabled. The total packets that underwent reassembly are also displayed.
VFR for IPv6 packets
The following is a sample output from the show ipv6 virtual-reassembly command:
Device# show ipv6 virtual-reassembly GigabitEthernet 5
GigabitEthernet5:
IPv6 Virtual Fragment Reassembly (IPV6VFR) is ENABLED [out]
IPv6 configured concurrent reassemblies (max-reassemblies): 64
IPv6 configured fragments per reassembly (max-fragments): 16
IPv6 configured reassembly timeout (timeout): 3 seconds
IPv6 configured drop fragments: OFF
IPv6 current reassembly count:0
IPv6 current fragment count:0
IPv6 total reassembly count:12
IPv6 total reassembly timeout count:0The example shows if VFR for IPv6 is enabled or not. Virtual Fragment Reassembly (VFR) is ENABLED [out] signifies that VFR is enabled. The total packets that underwent reassembly are also displayed.
Underlay fragmentation
The following is a sample output from the show ip traffic interface GigabitEthernet 1 command:
Device# show ip traffic interface GigabitEthernet 1
GigabitEthernet 1 statistics :
Rcvd: 11048818 total, 749458331 total_bytes
0 format errors, 0 hop count exceeded
0 bad header, 0 no route
0 bad destination, 0 not a router
0 no protocol, 0 truncated
0 forwarded
0 fragments, 0 total reassembled
0 reassembly timeouts, 0 reassembly failures
0 discards, 0 delivers
Sent: 0 total, 0 total_bytes 0 discards
0 generated, 0 forwarded
0 fragmented into, 0 fragments, 0 failed
Mcast: 0 received, 0 received bytes
0 sent, 0 sent bytes
Bcast: 0 received, 1256 sentThe example shows the number of packets that were sent and received, including the total number of packets. A change from the previous number of packet tranfer indicates that underlay fragmentation is enabled.
The following is a sample output from show sdwan ftm tloc-list command:
Device# show sdwan ftm tloc-list
--- LOCAL TLOC LIST ---
Id: 32775 (binosId=0xf808007f), Tenant Id: 0 LocalTLOC, num-nhops: 0 ,hash: 0, ref: 1 SLA 0x0:0x0 Inner-fragmentation
-disable: No
[TOTAL-LOCAL-TLOC:1]
--- REMOTE TLOC LIST ---
Id: 32768 (binosId=0xf808000f), Tenant Id: 0 SLAClass, num-nhops: 0 ,hash: 0, ref: 1 SLA 0x0:0x0
num-active-nhops: 0
Id: 32774 (binosId=0xf808006f), Tenant Id: 0 SLAClass, num-nhops: 1 ,hash: 0, ref: 1 SLA 0x1:0x0
[nhop1] nhop-Id: 19 , Type: IPsec , Encap: IPSEC SLA 0x1:0x0hw_record_index: 5 198.100.1.5/12366->198.100.1.6/12346 pr
oto 0x800 hash 0x13 wan-if 3 tloc 32774 R-color mpls local-tloc 32775 L-color mpls BFD UP tloc-capability 0 SLA 0x1:0x0 weight
1 pref 0
num-active-nhops: 1
[TOTAL-REMOTE-TLOC:2]
--- PENDING TLOC LIST (is_pending_updates:FALSE)---
[TOTAL-PENDING-TLOC:0]
--- UNMATCHED TLOC LIST (is_pending_updates:FALSE)---
[TOTAL-UNMATCHED-TLOC:0]
--- TENANT LOCAL TLOC LIST --- The example displays all the local TLOCs in the network.
The following is a sample output from show platform software sdwanR0 next-hop overlay all command:
Device# show platform software sdwan R0 next-hop overlay all
Show sdwan next-hop oce all :
OCE ID: 0xf800013f, OCE Type: SDWAN_NH_OVERLAY
Overlay: client_handle (nil), ppe addr (nil)
overlay encap: ipsec
src-ip: 198.100.1.5, src-port: 12366
dst-ip: 198.100.1.6, dst-port: 12346
flags: 0x0, linktype: MCP_LINK_IP, ifhandle: 15, encap type: MCP_ET_NULL
encap rewrite: 00
mtu: 1446, fixup: 0x0, fixup_flags_2: 0x0, color: mpls, phy_oce_handle: 31, nh_overlay_h: 0xf800013f
Overlay_CFG:
encap type: ipsec
src-ip: 198.100.1.5, src-port: 12366
dst-ip: 198.100.1.6, dst-port: 12346
local_system_ip: 1.1.1.1
remote_system_ip: 2.2.2.2
local_color: 2 [mpls], remote_color: 2 [mpls]
wan_ifindex: 8 [GigabitEthernet2], tun_ifindex: 15 [Tunnel0]
tun_adj_id: 0, l2_adj_id: 0x1f, tunnel_qos_dpidx: 0x0
bfd-ld: 20005, ipsec_flow_id: 603979786, session_id: 5
Inner-fragmentation-disable: yesThe example demonstrates whether the inner fragmentation is disabled or enabled in a particular next-hop overlay.
The following is a sample output from show platform software sdwan F0 next-hop overlay all command:
Device# show platform software sdwan F0 next-hop overlay all
OCE ID: 0xf800013f, OCE Type: SDWAN_NH_OVERLAY
Overlay: client_handle 0x63d321350ba0, ppe addr db910710
overlay encap: ipsec
src-ip: 198.100.1.5, src-port: 12366
dst-ip: 198.100.1.6, dst-port: 12346
flags: 0x0, linktype: MCP_LINK_SDWAN, ifhandle: 15, encap type: MCP_ET_ARPA
encap rewrite: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
mtu: 1446, fixup: 0x0, fixup_flags_2: 0x800000, color: mpls, phy_oce_handle: 31, nh_overlay_h: 0xf800013f
Overlay_CFG:
encap type: ipsec
src-ip: 198.100.1.5, src-port: 12366
dst-ip: 198.100.1.6, dst-port: 12346
local_system_ip: 1.1.1.1
remote_system_ip: 2.2.2.2
local_color: 2 [mpls], remote_color: 2 [mpls]
wan_ifindex: 8 [GigabitEthernet2], tun_ifindex: 15 [Tunnel0]
tun_adj_id: 0, l2_adj_id: 0x1f, tunnel_qos_dpidx: 0x0
bfd-ld: 20005, ipsec_flow_id: 603979786, session_id: 5
Inner-fragmentation-disable: yesThe example demonstrates whether the inner fragmentation is disabled or enabled in all the available overlays.